McAfee web advisor

I have a new computer running Norton Security.  I have just noticed a MacAfee Web Advisor program running in the background.  this program scans webs sites and decides if they are safe or not. 

1.  Am I right in assuming that I do not need the Mcafee product, and can rely on Norton to do this?

2.  Is this program likely to clash with my Norton product

3. Should I remove it

Thanks

Monte-d