If you have a gap in your employment history, know that you're not alone. The majority of people have been unemployed at some point in their working life.
There are three places where you'll need to explain a gap during your job search: your resume, cover letter, and during the job interview. While there are ways to minimize the impact of employment gaps, you still need to be honest and forthcoming when explaining them.
This article outlines everything you need to know about explaining gaps in your employment history, including where to explain employment gaps and a list of good reasons.