Small technical SEO check I do before shipping a new page template

Before a new template goes live, I like to crawl 10-20 rendered examples and check the boring stuff that tends to create SEO cleanup work later:

• Exactly one indexable canonical URL per page state
• Title and H1 are generated from different fields, not duplicated blindly
• No empty meta descriptions from missing CMS fields
• Pagination/filter URLs either have a clear index/noindex rule or are blocked from exploding into crawl traps
• Product/article schema is omitted when required fields are missing instead of outputting half-valid JSON-LD
• Internal links render server-side or at least appear in the initial HTML for important paths

Most of this takes less time to catch in staging than it does to explain to a client after 5,000 thin URLs get indexed. The best SEO fixes are usually the ones that never make it to production.