In Magento 2.3.6, there’s a “Welcome” message in the upper-right corner that says “Default welcome msg!”. You can easily customize this welcome message for each store or store view.
To change the welcome message:
Log in to your Magento 2.3.6 backend
On the left menu, go to Content > Design > Configuration
Click on Edit at the storeview that you want to change welcome message.
Under Other Settings, select Header
Under Header section, edit the Welcome Text field to change the default Magento welcome message
When you’ve done editing, click Save Configuration. There may be a popup asking you to refresh cache. To do that, click “Cache Management“
Check the boxes before Configuration and Page Cache, then select action Refresh and then click Submit
Done! Now refresh your homepage and check the new welcome message!