Drupal site name is displayed on the upper left side of your home page. This is also what appears beside the tab icon by default when you are on the home page of your website.
Change your Drupal site name using the steps below:
Step 1. Log in to your Drupal dashboard via the link yourdomain.com/user/login (replace yourdomain.com with the domain of your website) or via Softaculous Apps Installer in cPanel.
Step 2. Click the Manage drop-down.
Step 3. Click the Configuration button.
Step 4. Click the Basic site settings option under SYSTEM category.
Step 5. Enter the new Site name in the box provided.
Step 6. Click the Save configuration button at the bottom of the page to save the changes made.
Try accessing the website. The changes should take effect right away.