Just like running a car for a long time, the ongoing use of your website is likely to leave it running a little rough over time. There are a few nagging issues that will keep popping up on your site no matter how diligent you are in your day to day activities.
Broken Links and 404 Pages
Broken internal links or broken links leaving your site are just a matter of life, they happen and no matter what you do they will still always rear their ugly head from time to time. Sometimes you delete a page, move a page, change a URL or simply mistype a link. These things happen and they probably always will. Taking some time to crawl your site and check for any broken links is a must.
Redirect Chains
Sometimes it is the diligent who end up causing problems. Many SEO wise people understand the importance of placing 301 redirects when a URL structure has changed and this will always be best practice. A redirect chain can occur when URL’s have been updated multiple times in a non-stop process of due diligence.
An example of this may be something like:
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You start with an existing web page
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Exampleurl.com/first-instance
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You then decide that this page should actually be sitting under a different path or directory, so you change the url to
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Exampleurl.com/demonstrations/first-instance
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Being the diligent SEO that you are you put in your 301 redirect from the first version to the next, just making sure that the correct page will render even if the old link is hit.
So far this isn’t a problem. It becomes a problem down the track though when you migrate the site to use HTTPS instead of HTTP.
Suddenly you have a forced 301 for every single page as the system pushes all HTTP pages to the new HTTPS. Meanwhile, any links that are pointing at Exampleurl.com/first-instance are now being redirected from a HTTP version to a HTTPS version, and then redirected from the old URL structure to the new URL structure.
Its not just a HTTPS migration that can cause this, its just a common incarnation of this problem.
Missing Meta Tags, Alt Tags and More
Even the most diligent content producer will occasionally have a deadline they need to meat and simply overlook some of the smaller details such as writing a meta description, adding some alt text or making sure that the title tag isn’t just a rendition of the H1.
Little problems that mount up slowly over the life of an active and growing website.
Duplicate Content
With a modern CMS you will be surprised by how frequently duplicate content can rear its misunderstood head. You can see a great collation of causes of duplicate content here on this Yoast blog https://yoast.com/duplicate-content/#causes.
Either way, you do not want to have duplicate content issues, so it is best to be checking for these regularly.