As part of customizing your Shopify store, you may want to add your own credentials in the Footer of the store. To do this, first, remove ‘Powered by Shopify’ or 'Theme by Debutify' and add your own credentials.
How to Remove ‘Powered by Shopify’ or 'Theme by Debutify' from the Footer
In Shopify admin, click on Online Store.
Select your Debutify Shopify theme and click on Customize.
Click on the Footer section.
Under Credentials, untick Show powered by Shopify and/or show theme by Debutify.
Click Save to apply the changes.