Crawl budget gets wasted when Google visits pages that don't matter—old pagination, duplicate content, parameter URLs you never needed indexed. Check your server logs and find where Googlebot spends time. Block useless paths in robots.txt, consolidate similar pages, use canonical tags properly. The goal is making sure crawlers hit your important pages more often. I've seen sites double their indexed pages just by cleaning up what gets crawled.

Indexing delays happen when Google can't render your JavaScript, when your internal linking is weak, or when your pages take too long to load. Use server-side rendering or prerendering for critical content. Build a solid internal link structure so crawlers discover new pages quickly. Fix your Core Web Vitals—slow pages get crawled less frequently. Also check Search Console for crawl errors and blocked resources. Sometimes it's just a misconfigured robots.txt file preventing access to CSS or JS files Google needs to understand your page.

Site architecture determines how authority flows through your site and how easily crawlers find content. Keep your important pages within three clicks of the homepage. Use clear category structures and proper breadcrumbs. Flat architecture works better than deep hierarchies for most sites. Internal linking should reinforce your priority pages, not scatter authority randomly. Think about user navigation and crawler efficiency together—they're not separate problems.

Use canonical tags whenever you have similar content on multiple URLs—product variants, filtered pages, printer-friendly versions, HTTP versus HTTPS. Point all versions to your preferred URL. Don't use canonicals to merge completely different content. Self-referencing canonicals are fine and actually help prevent parameter pollution. Check that your canonical URLs are indexable and return 200 status codes. Broken canonicals are worse than no canonicals.

Schema markup fails when the syntax is wrong, required properties are missing, or the data doesn't match visible content. Use Google's Rich Results Test to validate your markup before deployment. Make sure your JSON-LD is properly formatted and includes all required fields for your schema type. Don't mark up content that isn't on the page—Google will ignore it or penalize you. Keep schema updated when you change content. Most schema problems come from incomplete implementation or copy-paste errors.

Pagination needs clear structure so crawlers understand the relationship between pages. Use rel="next" and rel="prev" if you want, but modern Google handles pagination without it. More important is making sure each page has unique content and proper titles. Consider implementing "load more" or infinite scroll with proper URL updates. Avoid orphaning deep pagination pages—they should be discoverable through categories or filters. Check that your pagination doesn't create duplicate content issues with sorting or filtering parameters.