When you need to convey information quickly and succinctly, the use of the word "briefly" is often necessary. However, it's useful to have a variety of synonyms to keep your writing and speaking fresh. Some alternatives to "briefly" include "concisely," "in short," "summarily," "to sum up," "in brief," "in a nutshell," "in a few words," "to put it briefly," "to cut a long story short," and "to give the gist." All of these phrases convey the idea of presenting information quickly and efficiently, so try using a variety of these synonyms to keep your writing engaging and varied.