On the 'New Property' page, make sure the page is set to 'Website' not 'Mobile app'.
Then complete the rest of the fields on the page:
The Name of your website, or your company name.
This is your URL, eg: https://www.toolkitsupport.uk
This one if optional, but Google tailor some suggestions for your account.
This is key for making sure Google Analytics accurately show your statistics
Get Tracking ID