The FTC has sent out warnings to Google (GOOG +0.9%), Yahoo (YHOO +2.2%), and 22 other Web search firms to more clearly distinguish search ads from regular results. Among other things, the agency says the background shading for ads isn't always visible enough, particularly on mobile, and that labels indicating the presences of ads aren't always easy to spot. Google arguably does a decent job of distinguishing ads, providing yellow background shading and a headline that says "Ads" or "Ads related to..." Yahoo provides a headline, but its shading is harder to detect. Slight changes to ad presentation can have a big impact on click rates/monetization. Also: Janney has started coverage on Google with a Buy and $1,050 PT.