Your writing will be faster, livelier, and clearer if you write short paragraphs. The reader will welcome the break and the white space. You will be less likely to get tied up in verbal knots. Your thoughts will be better organized and more succinctly expressed. You and the reader will find it easier to locate specific statements.
Taken from “100 Ways To Improve Your Writing” by Gary Provost ISBN 978-0-451-62721-6