GSA Search Engine Ranker.

Wow this much misinformation. I will try to answer the questions and opinions.
1. GSA Search Engine work pretty well for Tier 2-4 Backlinks NO TIER 1.
2. Backlinks are incredibly important for ranking your site so they do matter for Google, a lot.
3. You need high quality Tier 1 backlinks and after creating them you need to dripfeed them with a indexer. Same goes for Tier 2 and 3 backlinks
Wish you a gret day