That small paragraph you see below each Google search result? That's the meta description. It's a 150-160 character summary that tells searchers exactly what they'll find if they click. While Google says meta descriptions don't directly affect rankings, they massively impact your click-through rate.
A great meta description includes your target keyword and a clear value proposition. For example: "Learn 5 simple Facebook marketing strategies perfect for beginners. Boost your reach and engagement today." This tells the reader exactly what they'll get. Without a compelling meta description, even the best content stays invisible in search results.