For high CTR, your first 2 lines should contain keywords. The ideal total description length is between 200-400 words for the algorithm to index correctly.
Short sentences (15-20 words) improve readability. Content that is easy to scan has a 50% higher chance of retaining viewers on digital tool hubs.
Avoid "keyword stuffing." Aim for a 1-2% density of your primary keyword to ensure your utility tools rank safely on Google AdSense approved sites.