Google Merchant Center is a Google-owned platform that allows merchants to manage and display their products on Google Shopping and also on Google search.
It helps merchants promote their products and increase online visibility, increasing the chances of reaching potential buyers.
To sign up for Google Merchant Center, the steps are as follows:

1. Go to the Google Merchant Center website and create a new account.
2. Verify your business identity by providing the necessary information, such as company name, address, and phone number.
3. Add the products you want to sell and make sure the product information is correct and complete.
4. Verify your website address and install product tags on your website.
5. Receive Google Merchant Center approval after demonstrating that your products and website meet the set terms and conditions.
6. Start optimizing your Google Merchant Center account by creating promotional campaigns, managing products and addressing issues that may arise.
7. Enjoy the results of promoting your products through Google Shopping and Google search.