Website Groups are helpful for grouping similar Websites. It makes them easier to find, and easier distinguish. You can use Website Groups to filter websites by company, by industry, or anything else you want.
Creating a Website Group
Adding An Existing Website to a Website Group
To add an existing website to a website Group, Go To the Settings wheel, then click Set up your Customer Website and Website Groups find the website you want to add to a website group, and Click on the Website
Under the Customer Website tab, the first choice should be the choice of Group, which refers to the Customer Website Group that the Storefront falls under. To change this, click the drop down and select the Website Group that you have created.