An SEO index performance calculator that quantifies the percentage of dead content on your site. Pages are grouped by engagement—Performing, Good, Fair, Weak, Potential, and Dead—based on clicks and impressions from search. It highlights index coverage, click share, and impression share to surface thin or low‑visibility URLs and pages with demand but no clicks. Use it to prioritize pruning, rewrites, internal linking, and indexation fixes for faster SEO gains.