First of all, choose the name for your Shopify store.

Shopify will automatically create an address for your store in the format https://yourstorename.myshopify.com

What’s Next?
The name of my Shopify store isn’t so important. Change it? How do I change it? Easy enough.

Step 1:  Choose Settings at the end of your left navigation bar.

Step 2: Then after clicking on the first option of the navigation bar Store detail.

Step 3:  At the Store name, you will see your current store name. Replace it with your new store name.

Step 4: Your store name has been changed successfully. Now, you can go back to the dashboard to see the result.