The backlink must be niche relevant and contextual. Also, it must be a dofollow backlink. What's not accepted:
A nofollow backlink
Backlink on some page that's not related to my niche (pet)
Backlink that can't be indexed
Backlink that is not present in an article (i.e., non-contextual backlink)
You must be able to make a niche relevant backlink on Wikipedia that is both contextual and dofollow within the mentioned budget
