What are the criteria than can have an influence on the value of a backlink?
In order to separate the wheat from the chaff, search engines no longer simply count the links but they try to evaluate them in the most intelligent possible way.
SEO professionals have then imagined (tested?) a hundred of criteria that can be included in the evaluation of links:
- Topic of the web page,
- Text anchor (clickable text of the link),
- Number of inbound links,
- Domain authority,
- Number of links on the web page,
- Number of outbound links,
- Incoming traffic,
- Location of the link,
- Optimization of the text framing the link,
- How long has the link been on the web page,
- Ranking of the page,
Among all these criteria, the popularity of the page and text anchor are 2 criteria which play a key role in the evaluation of a link.
The number of links is also a criterium that we cannot neglect. A backlink on a page that already has 150 links including 50 outbound links is of less interest even if the anchor is optimized and the page is popular.
The more your web page has links (both internal or external), the less "powerful" they are for the search engines.
So don't be too long-winded, Google will not give it back to you.
