There are several effective SEO modules available for Drupal. We often recommend using modules like Metatag, Pathauto, and Redirect for their comprehensive features. These modules offer functionalities such as optimizing meta titles, descriptions, and URLs, generating XML sitemaps, managing redirects, optimizing social metadata, and providing insights to enhance site SEO. Additionally, integrating Google Analytics and Google Search Console with Drupal is crucial for monitoring website performance and identifying optimization opportunities.