The Google Search Console or Webmaster Tools is an important tool, even if some underestimate it. Google gives you all the necessary data and important information about your website. Thus, you can evaluate everything and react u.a. You can connect the property to Google Analytics.
To be able to work with the Search Console, you first have to verify your website, there are various possibilities. Most use the HTML file as it is also recommended by Google, but I think that it makes no difference which variant you finally use in the end. I personally like to use the HTML meta tag to verify, because then I have no extra file on my server, which I actually do not need. Your website is like your home, an address below which you or your product reach since and accordingly, the website should be treated. But I do not want to go deeper here, as there are a lot of similar examples like above.
Search Console Verify
Website with Search Console Verified
Verified? Then make sure that your domain can only be reached at one URL ie. https://www.tnado.com/ is only accessible at this URL if you enter it like this https://tnado.com you will be redirected to https://www.tnado.com/ etc. and that's how it should be shape in the end you decide.
If you have Verified then your first property should be created. So with you have already done it and get from Google the first instructions on how to proceed via the Search Console by message.
Do not forget to verify your webpage with other webmaster tools, e.g. Bing
If your website is set up well you will see success, this is not the case you will u.a. a lot of bugs depending on how big your website is. Eliminate the mistakes so as not to jeopardize and improve your ranking. It is best to inform you in advance what u need so that these errors do not even arise in the Search Console :)