When Perplexity, Gemini, or ChatGPT cite your page, they often pull directly from your meta description. A clear, specific description gives AI engines an accurate summary to present to users — vague descriptions get ignored.
Descriptions with a clear CTA ("Try free," "Learn how," "Compare plans") consistently earn higher click-through rates in both traditional and AI search results. The CTA signals to users that your page delivers actionable content, not just information.
Google truncates descriptions based on pixel width, not character count. Narrow letters (i, l, t, r) use less space than wide ones (M, W, m). The 160-character guideline is approximate — this tool shows the actual pixel width so you can maximize every pixel.