@tng
What is dofollow link
Dofollow links are those that allow Google and other search engines to point back to your website or blog.
So, every time you insert a dofollow link on your site, it can point back to you, which strengthens your authority by showing search engines what other sites, blogs, and posts are linking to you.
For example: if Rock Content uses on its blog a link from company X that is dofollow, the page or blog post used in the link will be taken into account in the ranking.
This is called Link Juice by some users, and it occurs because of Google’s PageRank metric.
Therefore, when inserting external links on your blog, make sure they are from sites with good authority, as this will be very important for the growth of your blog’s authority.
https://rockcontent.com/blog/links-dofollow-nofollow/
or
What is a dofollow link?
dofollow link
Figure: Dofollow Link - Author: Seobility - License: CC BY-SA 4.0
A dofollow link is a hyperlink that links to another page or website and is used by search engines to help rank websites. They help search engines to understand how popular a page is, which in turn influences its ranking in search results on Google and other search engines. Every dofollow link to an external site can be considered a 'vote' or recommendation for that site. There are many additional factors, but ranking highly in search results is usually, at least partially, a consequence of a page being linked to from many different websites.
https://www.seobility.net/en/wiki/Dofollow_Link