when we search something on google we found a link bottom of every webpage 'Similar pages' when we click on it, google give us some similar site. My question is, my website has no any similar pages yet. Is it helpful for SEO? Please describe about this topic.
This is based on what sites link to you, and what sites you link to. You might want to check similar pages, using related: search operator, which returns the same results as the similar pages link. Here is an example: related:mydomain.com As a function is not helpful for SEO, but as it's related to link building, which is really helpful.