Repeatable field overview
A repeatable field allows an author to create lists of values of the same field type in an entry. Once this option is enabled for a field, multiple items can be added, removed, and ordered in the repeated list.
A list of names
Perhaps you want a list of names of research paper contributors that exist outside of your organisation. Setting a text field to be repeatable allows you to enter multiple names.
To create a list of opening hours, you could set up an opening hours component containing days of the week and two fields for the from and to time. You could then set this component to be repeatable so your authors can easily enter a set of opening hours unique to your business.