We understand there will be times when you need to work on your store and during the process, it is not ready for customers browsing. By changing store status to 'Under maintenance', you can easily let your customers know that your store is away but it is just temporary so that they will check back soon.
Step 1 : Click on Settings > General
Step 2 : Change Store status
In operation = Your storefront can be accessed in this status.
Under maintenance = Your storefront cannot access this status.
Attached GIF for extra reference:
💡 Tips :
Even if your website is under maintenance, you are able to view it from 2 places. Go to Settings > General > Store Status and click here
OR you can preview from Channels > Online Store > Customize and click on the Preview button on the top right
If your Online Store is not ready to launch online yet, you can go to Channels > Online Store > More > Disable my store > Disable
and your website would be temporarily inaccessible. You can always proceed with the steps above to enable back your Online Store.