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 only 100+ reviews and an average rating of 4.1 stars. Some features are missing compared to the WordPress version, but the app improves with every release.