Paginated URL missing next/prev canonicals
This means that the URL in question is a pagination URL, yet is missing rel="next" and rel="prev" link elements.
Why is this important?
Sometimes referred to as 'pagination canonicals', you can add rel="next" and rel="prev" link elements to pages to indicate that they are part of paginated series. In fact, this is one of the most effective ways to handle paginated content, and comes recommended by Google.
What does the Hint check?
This Hint will trigger for any internal URL which appears to be paginated, but is missing the next/prev elements.
Examples that trigger this Hint:
Consider the URL: https://example.com/page-a?p=2
The Hint would trigger for this URL if it contained some pagination elements in the HTML, such as 'next' and 'previous' links;
AND was also missing both of the following;
Rel next/prev link elements in the <head>:
AND rel next/prev link elements in the HTTP Header:
Why is this Hint marked 'Advisory'?
In Sitebulb, this Hint is Advisory, as it does not represent a clear issue. Next/prev is not technically required; an alternative solution, for example, is to use a canonical on all paginated pages which points at a 'View All' page. This article by Google lays out the different options for handling pagination, which includes 'Do nothing and let us figure it out'!
Please also note that Sitebulb is trying to figure out that a page might be paginated based on the HTML elements it finds - which means that false positives could occur, for instance if you happen to call a certain <div> 'next' and put an <a> tag inside it, but the page isn't in fact part of a paginated series. So please use your discretion with this Hint and don't just take Sitebulb's word for it!