How can i remove (or edit) from my store --> (- Gyps Light) I can not understand how it was added, and especially where it took the name Gyps Light
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You can disable it by following steps: Login to admin and navigate to Content -> Design -> Configuration Click on edit of your required theme Navigate to HTML Head tab and remove the Page Title Suffix you are using as show in below screenshot.
Note: It will take time reflect in google search as google take time to crawl.