To begin with, let's visit google.com/webmasters to create our free account(Sign in if you already have one)
Once you are inside the dashboard, you will see the option to add a property. Copy your Shopify store's URL from the address bar of the browser and paste it in the space as shown above. Then click ADD A PROPERTY button.
Verify your site
Once you have added your website, it will ask you to verify your ownership. There are several methods to do that. The easiest way to do it is by using any of the Alternate methods The easiest way verify your Shopify store is to via the Google Analytics option. For this option, you must have the Google Analytics account set up for your Shopify store with the same email id you have used for the Webmaster Tools account. Also, the Google Analytics tracking code should be already there on your Shopify store. If you don't have the Google Analytics setup for your Shopify store, do it first as you will need it anyway. If you have your setup your Google Analytics account with different email id then just give the Edit permission from your Analytics account to the email id used for the Webmaster Tools. Once you have the Analytics account set up just select the option and click Verify it will verify your website. Another easy method: Choose the “HTML Tag” option. Copy the HTML code that will be generated for you then go to Your Themes in Shopify. Look out for “theme.liquid” in your theme files. Open this file and right under the <head> tag, you can paste the code Google generated for you and we are good to go. After you are done doing that, go back to Google webmaster and click the “Verify” button at the bottom of the page. If you got this all done right the page should load and you should see this. Click continue and you can begin your journey with Google webmaster. You will be sent to your dashboard and there are a whole lot of features you can access to your benefit. Feel free to explore and find out how the options work.