Yoast SEO is the most popular SEO tool for WordPress. In September 2021, they released the plugin for Shopify stores. There are a lot of "SEO tools" on Shopify. However, most of them are simple image optimization tools.
Yoast SEO gives you a great overview of the SEO score for your products and collections. Allowing you to programmatically set meta tags for each. This is a great help as you can generate thousands of meta tags simultaneously. If you are unsure how to best write the meta descriptions, the AI-powered suggestions will help.
The app automatically generates rich structured data (schema.org) output in JSON-LD for your product pages, giving you a good chance of displaying the rich snippet in Google Search. The product ratings displayed in Google are always up-to-date thanks to integrations with popular review tools like Judge.me, Loox, Ali Reviews, and Opinew.
Yoast SEO costs $19 monthly, a decent price considering the amazing app value. You can also take advantage of the 14-day free trial. The app has 100+ reviews and an average rating of 4.1 stars. However, it is worth mentioning that most of the negative reviews do not refer to the quality of the app but to Shopify billing issues and removal of the app without following the uninstallation process. Some features are missing compared to the WordPress version, but the app improves with every release.