There’s loads that may go unsuitable on a web site, and each website goes to have some points to repair.
We checked out 1,002,165 domains to search out the most typical technical Web optimization points. Hold studying to see what we discovered.
These are the problems flagged essentially the most throughout the 1 million+ domains. The quantity is the proportion of domains the place the problems have been discovered on not less than one among their pages.

These are the most typical points, however each web site is completely different. You should utilize Ahrefs’ Web site Audit to get studies in regards to the points by yourself web site. That is free for verified websites with an Ahrefs Webmaster Instruments (AWT) account.
I made a sheet with the remainder of the problems when you simply need the information. If you would like my commentary on the highest points and prioritization for fixing them, preserve studying.
3XX redirect – 95.2% of websites
Most websites use redirects, and it’s not normally something to fret about. Websites, and the online generally, are all the time altering. We ran a research that discovered that ~two-thirds of hyperlinks to pages on the internet disappeared within the nine-year interval we checked out.
I’d be involved if there are redirect loops, the place a web page will get redirected infinitely, or when there’s a lengthy chain of redirects. Google will comply with as much as 5 redirect hops in a single session. And when it resumes crawling within the subsequent session, it is going to comply with as much as 5 extra. Something over 10 hops received’t consolidate alerts (like hyperlinks) correctly to the ultimate URL.
Yow will discover each of those within the “Points” tab within the Redirects report in Web site Audit.

HTTP to HTTPS redirect – 88% of websites
In the event you see this, nice! You need your website to be on HTTPS.
Now we have this as a notification in Web site Audit, and also you shouldn’t be involved except the redirect goes the opposite means—from HTTPS to HTTP. Yow will discover the HTTPS to HTTP redirects within the “Points” tab of the Inner pages report in Web site Audit:

A stunning variety of websites, >6%, are redirecting the unsuitable means.
One of many different points that may occur together with HTTP to HTTPS redirects is “blended content material” points. Yow will discover this within the “Points” tab of the Inner pages report in Web site Audit:

Some individuals spend lots of time updating the entire references to different file varieties to unravel these. There’s a greater means.
In the event you set a Content material Safety Coverage (CSP) for upgrade-insecure-requests, it is going to clear up your entire “blended content material” points. It solely takes a few minutes to set a rule in your .htaccess or server config for this.
In .htaccess, you merely add:
<ifModule mod_headers.c>
Header all the time set Content material-Safety-Coverage "upgrade-insecure-requests;"
</IfModule>
Lacking alt attributes – 80.4% of websites
Lacking alt attributes is an accessibility difficulty, which can flip right into a authorized difficulty. Most huge corporations have been sued for ADA compliance points on their web sites, and a few get sued a number of occasions a yr. I’d repair this for the primary content material photographs, however not for issues like placeholder or ornamental photographs the place you may go away the alt attributes clean.
For internet search, the textual content in alt attributes counts as textual content on the web page, however that’s actually the one position it performs. Its significance is commonly overstated for Web optimization, for my part. Nonetheless, it does assist with picture search and picture rankings.
Yow will discover lacking alt attributes within the Photos report:

Meta description tag lacking or empty – 72.9% of websites
I don’t fear a lot about lacking meta descriptions. They don’t influence rankings. Google will write one for you when you don’t have one or generally rewrite yours even when you do have one. Once we ran a research, we discovered that Google rewrites meta descriptions 62.78% of the time.
Nonetheless, there are occasions after I concentrate on them. Attempt to add meta descriptions when making a web page. If it’s lacking on a web page you actually care about or that will get lots of visitors, you might wish to add it. You may additionally wish to add one when you’ve got a novel promoting level or give you suppose could be compelling for customers.
You’ll discover the “lacking meta description” difficulty within the Content material report in Web site Audit.

In the event you click on into the difficulty, you may kind the pages by “Natural visitors” within the report.

Gradual web page – 72.3% of websites
We normally deem a web page as gradual through the use of our personal subjective measure of pace. To get a greater concept, I like to recommend enabling Core Net Vitals in your undertaking’s crawl settings.

That is going to attach you to Google PageSpeed Insights and can pull the Core Net Vitals metrics into Web site Audit. These are the metrics Google really makes use of in its rankings and are pulled from the identical knowledge supply.
Another auditors will pull lab take a look at variations of those metrics. But when the software isn’t connecting to PageSpeed Insights, you’re not getting the precise Core Net Vitals knowledge, which comes from real-world customers of Google Chrome. In the event that they’re exhibiting you Whole Blocking Time (TBT) from Lighthouse as a substitute of First Enter Delay (FID) or Interplay to Subsequent Paint (INP), that’s a straightforward approach to inform the distinction.
We provide the Lighthouse-based take a look at scores, in addition to the Core Net Vitals take a look at scores. Try the Efficiency report in Web site Audit for these points and extra.

Web page and SERP titles don’t match – 68.5% of websites
It’s possible you’ll wish to enhance the web page title if it’s not related to the web page since it’s a rating issue. You may additionally wish to enhance titles for pages getting lots of search visitors the place you suppose you are able to do a greater job than Google.
Yow will discover the “Web page and SERP titles don’t match” difficulty within the “Points” tab of the Content material report in Web site Audit.

In the event you click on into the difficulty, you may kind the pages by “Natural visitors” within the report.

I made a script some time again that you should use to see which of your titles Google modified essentially the most from their authentic textual content. It’s very easy to make use of. Right here’s the script and a video of use it.
Web page has just one dofollow incoming inside hyperlink – 66.2% of websites
No less than it’s not a totally orphaned web page. But when it’s a web page that you simply wish to rank, you might wish to add some extra inside hyperlinks.
The best approach to see inside hyperlink alternatives is with our software in Web site Audit. We take a look at what your pages are rating for and recommend hyperlinks from different pages in your website that discuss these issues.

Title too lengthy – 63.2% of websites
We estimate if the title tag is being reduce off on the SERPs, however you might wish to manually examine if it’s reduce off on desktop or cell searches. Cellular sometimes permits longer titles than desktop. We plan to truly examine the SERPs for you sooner or later. However for now, you might wish to examine pages which are essential to you.
If the title is reduce off, you might wish to regulate your tag to suit. Nonetheless, the rating relies on the entire title tag, not simply what’s proven on the SERPs, so you might wish to go away it alone.
Web page has hyperlinks to redirect – 62.7% of websites
So long as the redirects resolve to a different web page and there are fewer than 10 hops (like I discussed earlier), that is high-quality. I normally put points like this within the backlog for somebody to scrub up after they get an opportunity, however I don’t take into account it an enormous difficulty and don’t prioritize it.
It’s possible you’ll wish to examine if any of the chains are too lengthy. Search for this within the “Points” tab within the Redirects report.

H1 tag lacking or empty – 59.5% of websites
I take into account H1 tags lacking a minor difficulty, particularly if the textual content is wrapped in an H2 tag as a substitute. It’s normally a straightforward repair to vary them, so I’ll largely do it—however I don’t count on a lot influence.
Yow will discover the difficulty within the Content material report in Web site Audit.

Meta description too quick – 59.2% of websites
You already noticed that I typically don’t fear about lacking meta descriptions, so why would I fear in the event that they’re too quick? But when it’s a web page you care about and you’ve got one thing so as to add to the outline, go for it.
Like I discussed earlier than, I feel meta descriptions are a very good place so as to add distinctive promoting factors or presents when you’ve got them.
Yow will discover the difficulty within the Content material report in Web site Audit.

Open Graph tags incomplete – 56% of websites
Not each web page wants Open Graph meta tags, so I’m not stunned by how typically these are lacking. They’re actually solely wanted for pages that you could be share on social media.
I sometimes don’t take into account these tags to be associated to Web optimization. The one time they could be used for one thing Web optimization-related is after they’re utilized in Google Uncover as a substitute of your title or function picture.
The one profit they will have for Web optimization is that you could be get a bit extra publicity on social media, which doubtlessly results in some further hyperlinks. They don’t seem to be used instantly in rankings.
Meta description too lengthy – 54.5% of websites
In the event you haven’t already realized it, I don’t focus a lot on meta descriptions. If it’s a web page that’s essential to you and you’ll write a greater meta description that matches, go for it.
I’ve simply seen too many audits recommending that somebody ought to rewrite 800 meta descriptions, and I cry for that poor soul.
Yow will discover the difficulty within the Content material report in Web site Audit.

A number of H1 tags – 51.3% of websites
A number of H1 tags are allowed in trendy HTML, and Google has mentioned this isn’t an issue. HTML5 has supported a number of H1s because it launched in 2014.
I’d simply examine to verify the entire headings you might have as H1s are related to the web page.
Yow will discover the difficulty within the Content material report in Web site Audit.

Meta description tag lacking or empty (non-indexable web page) – 50.8% of websites
We break up lots of completely different points based mostly on if a web page is indexable or not indexable. That is meant to avoid wasting you time by not specializing in points on pages that aren’t listed anyway.
As an illustration, you wouldn’t fear a few meta description on a web page that may’t be listed as a result of that meta description can’t present up in a search end result. Don’t spend time right here.
Tip
As soon as once more, right here’s a sheet with the remainder of the problems. Hold studying to be taught extra about prioritization of points, which is what I take into account the toughest factor for SEOs to get proper.
What you prioritize to repair will likely be decided by the size of the problems and which of them you suppose could have essentially the most influence in your website.
Now we have a default prioritization for points in Web site Audit, however you may edit the precedence by going to “Situation settings” on the prime proper of the Web site Audit dashboard. I’ll warn you now that altering the difficulty prioritization will influence your Well being Rating!

In reality, you may absolutely customise the problems. You possibly can edit present points, create new points, change the precedence of points, or flip off ones that don’t matter to you.
Prioritizing fixes and even figuring out when you ought to repair some points is without doubt one of the hardest components of technical Web optimization. It will get much more sophisticated when it’s important to weigh fixing technical points together with issues like creating content material or hyperlinks.
Typically, the most effective plan of action is to do nothing as a result of the prices outweigh the advantages.
I don’t wish to make assumptions about your websites on this research, however I’ve listed among the initiatives I’d prioritize in our newbie’s information to technical Web optimization. We even have guides on doing a technical audit and fixing technical Web optimization points to offer you extra concepts.
The way in which I normally prioritize points is by the influence I imagine they’ll have and the hassle that I (or my dev crew) imagine it is going to take to repair them. This makes for a pleasant visible for displays and helps you see which fixes could have essentially the most influence with the least effort.

Closing ideas
An enormous thanks and shoutout to my colleague, Oleksiy Golvoko, for serving to me collect this knowledge! It was attention-grabbing to see the problems at a scale that has by no means been executed earlier than.
In case you missed the opposite two hyperlinks to it, here’s a sheet with the remainder of the problems.
When you’ve got any questions, message me on Twitter.