Complex sentence: Professional writing is any form of written communication produced in a workplace environment or context; works produced with the professional writing style allow professionals (e.g. employers, lawyers, businesspeople, etc.) to make informed decisions.
Split into simpler sentences: Professional writing is writing for reward or as a profession, or it is any form of written communication produced in a workplace environment or context. Works produced with the professional writing style allow professionals (e.g. employers, lawyers, businesspeople, etc.) to make informed decisions.