So What Exactly is a Call to Action? (GrokDotCom) -- "The most obvious Calls to Action are ones that say “Add to Shopping Cart” or “Buy Now” or “Subscribe.” A straight-forward “do this.” At the most basic level, they tell the visitor what she can accomplish on that page, and encourage her forward in the conversion process." (Comments: Think about how many times you have visited a web site and wondered, what next?)