What does it mean for the purpose of a blog to "have legs"?

A) The purpose is rich enough that it can supply content ideas for an extended period of time
B) It is mobile
C) It is built around specific audience events
D) It covers whatever is most important to the company
E) It covers whatever is most important to the chosen audience

A
Explanation: A) A business blog needs to have a business-related purpose that is important to your company and to your chosen audience. Moreover, the purpose has to "have legs"—that is, it needs to be something that can drive the blog's content for months or years—rather than focus on a single event or an issue of only temporary interest.