The point of a memo—as opposed to a full business letter—is to convey information or make a request in the most efficient way possible. How To Write an Effective Memo. This is a general guide on how to write a memo (aka “memorandum” if you wanna be technical) that: gets read. has a clear. If you need to inform your employees of official internal business, here's an easy- to-follow business memo template, as well as examples for.