RL means "Root Domains Linking". These metrics refer to the top 1-10 positions in Google and tells us from how many unique domains the backlinks are from.


RL Avg

Average number of root domain links (unique domains that link to the results) of Google places 1-10 for that keyword.


RL Max

Maximum number of root domain links (unique domains that link to the results) of Google places 1-10 for that keyword.