There are over a billion websites in the world. The .SITE domain is absolutely suitable for any project and will be an excellent substitute for more "populated" national or international domain extension.
For the official website of the company
Any business not having a website dedicated to it business is not a serious one. If you are still yet to have your own business website then make sure to do so as soon as possible. You could easily start by registering a .SITE domain for your website. With this website you get to showcase the services or products that your company provides online without having to depend in third party services that are not reliable.
For construction sites
Are you a construction company? Then you can make use of the .SITE domain name for a website dedicated to showing where your company is currently operating or even previous constructions projects you have worked on. This way you will easily have a mobile portfolio to showcase, and book contracts easily.
For blogs and media
Highlight the latest developments and share your own opinions about important incidents on your website or blog registered with a .SITE ending.