This group in display conditions option allows you to display the content for a limited time period.
This limits the user views such that it is only visible to people from set date and time.
To set this go to the Display Conditions > Choose to Include/Exclude those conditions. The Date option will allow you to set a start and end date whereas the Time will allow you to set the start and end time in order to view the content. This best works in case of sale or any limited offer running on the site.
Irrespective of match all the conditions value if any of these turns true it will be applied.