Spree SEO is a plugin to extend SEO capabilities.
Add spree-seo to your Gemfile and run bunddle install:
gem 'spree-seo'
Next, you need to run the generator to create the migrations:
rails generate spree:seo:install
Then run rails db:migrate
so the migrations can take effect
rails generate spree:seo:install
Lastly, you need to mount the engine in config/routes.rb
so routes can become available:
mount Spree::Seo::Engine, at: '/'
s You should restart your application after these updates. Otherwise, you will run into strange errors, for example, route helpers being undefined.