Depends
Are you riding Desert, MX, HS, woods? Read the manual.. I ride Dez and have mine set as wide as possible and about 12-15 clics out.. Don't go more than 15 clics out or it won't hardly do anything. The farther you have it set in (less clics) the more it affects the low speed dampening.. Wanna see? turn it all the way in and while the bike is on the stand, jerk the bars quickly in one direction,.. The thing should hardly turn.. .. Go to 12 clics and do the same.. This should give you an idea of what to expect.. Just rememebr , the more clics, the more it only affects the high speed dampening..
Sweep depends also on what you are doing.. For MX I would set it as narrow as possible.. For Dez I set mine wide.. Once again READ and STUDY THE MANUAL