I'm looking to join some local chambers of commerce for some decent backlinks. My competitors have them who rank better than I do so I figured I'd get some of there backlinks. My question is what is the most important thing when it comes to the backlink, Domain Authority,page authority,spam score,number of root domains and total links. The ones I'm looking at are all providing a follow link with a chamber membership. I'm just trying to hand pick the best.