some things that are essential to consider when picking out high-quality backlinks.
the most crucial tip I have here, is to get your website listed with no more than a few other links. The more links on a page, the less value that page may have for you. For this reason an in-content link with just a few other sites mentioned if that, will hold more quality for you, than getting listed on a resource pages, where there are lots of other links. What goes on here is that the trust and authority end up getting divided up by all of those links.
Speaking of getting mentioned by others. If you are capable of getting listed along with a few authoritative sites, that can do miracles for your backlinks building as well, as Google will begin to align your website alongside those various other authoritative websites.
If you’ve even checked out a web link directory. I’m sure you have noticed a few that need you to put backlinks on their website, in exchange for them to link to you. This is simply not a good option. Google is smart enough to figure this out and does not value them very much. Always do whatever you can to obtain a one way link.
Remember the easier it is to get backlinks, the less value it probably has.