How to find and check backlinks

[grofee]

To find and check backlinks:
1: Navigate to Link Explorer
2: Enter your competitor's URL
3: Navigate to the "Inbound Links" tab
4: Export backlink data into .csv
5: Compile backlink .csv results from all competitors
6: Sort all backlinks by Page Authority
7: Review all linking sites for opportunities

[JesicaJoh]

Ok, Got It, This is very informative information. But I want to know which is the best tools for analyzing back-links in free way ?