Call to Action

In marketing, a call to action (CTA) is an instruction to the audience to provoke an immediate response, usually using an imperative verb such as "call now", "find out more" or "visit a store today".

Call to action (marketing)
Wikipedia
10 techniques for an effective call to action
Boagworld
30 Call-to-Action Examples You Can't Help But Click
HubSpot
21 Call to Action Examples and 3 Rules for Effective CTAs
The Daily Egg
Call to Action Phrases That Will Convert
Sprout Social