Navigate to Settings → Smooth Search → Maintenance and click "Rebuild Index". The process runs in the background and you'll be notified when complete.

Check your WordPress cron jobs are running properly. You can manually trigger index regeneration from the plugin settings or use WP-CLI: wp smooth-search rebuild

Yes! Use the smooth_search_results filter to modify results before display, or override the template files in your theme.

Absolutely. Use the smooth_search_indexed_fields filter to add custom fields to the search index.