Rel=Canonical Generator – How To Generate rel=canonicals using Excel
The rel=canonical is an HTML attribute that helps search engine spiders understand which is our preferred page and which exactly we want to be indexed on search engine results.
These are only some of most common cases where we would need the use of the rel=canonical:
Pagination content issues: This HTML attribute is particularly useful if you have an e-commerce site and your site maybe suffers from massive duplicate content issues.
Parameters: it is quite common to have an e-commerce site and see a lot of filters, parameters, instead of having faceted navigation which would be the best option. Thus, what happens if we don’t have facets but filters, parameters?? And worse, what happens if these parameters, filters are already indexed on SERPs? Well in this case again we would use the rel=canonical attribute which would indicate to search engine spiders our preferred pages. In this way search engine spiders will not have to consume their crawling budget for pages that should not be crawled and indexed in the first place.