how to install google analytics code

Google tells us to insert the code to the pages. In WordPress, you can have the other plugin ways to integrate with Google Analytics:
(1) Using a plugin
This is the easiest way. For example, in my website, I used ‘Google Analytics by Yoast’ plugin. It allows me to track my website easily and always stays up to date with the newest features in Google Analytics.

(2) Create a plugin
The plugin inserts google analytics code to everypage automatically. You can create a simple plugin that will automatically insert it into every new page that’s created in your site. Refer to this article for the same: