Check files against each other when removing duplicates

Check files against each other when removing duplicates

What is the use of this option, for what are your recommend this, can I tick this?

What is the use of this option, for what are your recommend this, can I tick this?
Comments
If you're using SER, you don't want to enable this option since some URL's can be identified by more than 1 engine. If the same URL is found in 2 files, it will remove one of them.
For SER use, its best to leave this unchecked.