There's a difference between knowing your data and suffering from "analysis paralysis" (i.e., the obsession with data to the point it is ineffective to attain positive business results). Typically, I only use JPEGs for bigger, more visual images taken by a true photographer. But, for my daily use, PNG …

As has been noted, marketing communications consists of much more than traditional advertising. As such, few businesses know what content they need to include in order to attract online traffic to their website instead of their competitors. Study your niche (a.k.a. know your target audience!) and write specifically …