Link pyramid tier 1 tier 2 tier 3
SEO backlinks for SEO are divided into anchor and non-anchor links.
Anchor links are linked to a key query, as this keyword is fundamental for search engine ranking.
Non-anchor links are just as important – these are bare links, while the ability to click plays a key role as they offer a route to search engine crawlers; search engines access the site along with internal pages, that helps your project.
I provide ahrefs. In cases where backlink counts are lower for one of the services, the analysis focuses on the service with the highest count of backlinks because of delays in indexation.