This group in display conditions option lets you restrict content access for specific browsers, devices and operating systems.
With these you can limit the users views to people who open the page on a particular device in a certain browser over a certain operating system mentioned by you in the backend.
To set this go to the Display Conditions > Choose to Include/Exclude those conditions. In case of Devices select were you want to limit the access, with Browsers choose from the list mentioned and similarly with the Operating systems.
All the conditions are taken as a whole here, irrespective of the match all the conditions value, if any of these turns true it will be applied.