You can create screenshots to share with your friends or colleagues.
Use the Camera icon from the menu to choose between renders and Panorama.
If you select 'Realistic render', you will be able to choose the quality of the render (Draft, HD and 4K).
Tip: Picking Draft quality won't spend your render slots but will create a screenshot that you can share. Always make a draft first. If you're okay with it, you can always convert it to HD from the "My renders" section.
4K renders are available with the Pro subscription.