5. Links and Navigation
Links are crawlable
You might be surprised, but there are many, many ways to create web links.
In order for a link to be crawlable, search engines usually cayman islands mobile database require an <a> tag with an href attribute. Yes, many developers create links without these attributes.
Page not linked to Broken page 404
404s are everywhere on the web. It’s a natural part of the ecosystem. If you happen to link to a 404, it doesn’t usually represent a big SEO problem.
That said, links that result in 404s are probably bad because:
They can create a frustrating user experience.
Stop the flow of links, such as PageRank.
Linking to a large number of 404s may indicate that the page is out of date and not maintained.
The results are better when you fix broken links at scale, and your efforts are likely to get a greater return when you prioritize internal links. If you have a very large site, hitting every 404 and fixing them may be a low ROI exercise, although the ROI increases with the importance of each page.
Most SEO crawlers can identify broken links and 404s. If you just want to audit a single page, many Chrome extensions such as Broken Link Checker can easily do the job.