To determine which crawl errors to fix first we look at which pages your business relies on for its evergreen sales revenue. Hill Web Marketing typically starts with checking for any indexation issues, robots.txt file mistakes, and Meta robots NOINDEX issues. Andreas Schwabe reported in The Real Cost of Poor Website Quality that companies can attain up to a 26% gain in the effectiveness of their marketing spend by maintaining an error-free, fully functioning website. The May 23, 2020 post found in their research that the most common problems are oversized pages, slow-loading pages, and broken pages. Our experience aligns with that.