It looks like you are looking for contextual backlinks, correct me if I;m wrong :).
Contextual backlinks are the ones which are most favoured by search engines due to their nature.
If you want to rank high in search engines you need the backlinks which origin is related to the content of your website. For example, if you have a website which content speaks about tuning cars you might want to have backlinks coming from posts or articles which are related to cars, and the best would be car tuning.
This kind of backlinks are the ones search engines like the most and treat them as a valuable indicator and therefore increase the value of your website and put it way ahead your competition.
I have recently came across pretty much interesting service which allows you to order cheap contextual backlinks for only few bucks.
Thanks for reading and take care.