In brief
Definition 1 of 1
Pro Tip 1/3Quick Summary
Use 'in brief' to summarize information quickly without going into detail. 
In brief, the meeting was about the company's sales strategy.
Pro Tip 2/3Preceding Details
'In brief' often follows a detailed explanation to provide a concise summary. 
After discussing the history, let me now tell you in brief the main events.
Pro Tip 3/3Speech Indicator
Before speaking, 'in brief' signals that you will give a condensed version of your thoughts. 
In brief, my opinion is we should invest more in marketing.