How to know which links are of low quality?

[ani2002]

The short answer to this is: yes, paid links or links from bad neighborhoods on the web can hurt your site's rankings in Google. ... Instead of simply assuring us that bad links won't hurt our site in Google's search results, they're now telling us that it's unlikely, and that they probably won't.

How does it help to my query?

[frank]

Hi,

You can follow these point to check it is good or low-quality back-link:

-MozRank
-Domain Authority (DA)
-Page Authority(PA)
-Google index status
-check Do follow and No follow
-Spam score
-Content(Unique, readable and strong)
-page rank
-alexa rank
-Related link

Hi,

you can use paid tools like Ahref, MOZ, SEMRush to know which links are low-quality

Check out to points here for low -quality links

- MOZ DA PA
- Ahref  DR UR
- MOZ Spam Score
- Traffic on that Site
- Relevant Backlink category
- Link type (dofollow- nofollow)

You two just shared some tools. OP hasn't asked for any. Read before you post.