In google analytics when we select "All visits" means it includes paid and unpaid traffic or just unpaid traffic? Note that at the same time we also working on PPC. I checked the search engine traffic using option "All Visit", it is 400 visits in a month. This 400 visits is a part of unpaid or paid (ppc) traffic? I also checked the traffic through the selection option "non paid traffic". I found that traffic 385 (search engine traffic). Why there is small difference in the no. of visitors?
"All visitors" means all the visitors who visited your site, this includes visitors from your ad campaigns. If you need to check your visitors from ads Go to Traffic sources > adwords