There are a number of appropriate PPC forums for you to participate in on DP. Here is one as a start: https://forums.digitalpoint.com/forums/pay-per-click-advertising.20/
Not sure, but in addition to that one (and its sub-forums, of course) I also see these forums targeted specifically to the specific search engine: https://forums.digitalpoint.com/forums/google-adwords.35/ https://forums.digitalpoint.com/forums/yahoo-search-marketing.84/ https://forums.digitalpoint.com/forums/bing-ads.82/