If, say, you'll be giving a presentation and need to connect your iPad to a projector, the following article may be of help:
https://www.lifewire.com/connect-ipad-to-projector-4580611
And I heard a rumor today -- at an Apple Store -- that when iOS 13 is released, it will include the capability to use a mouse with an iPad. I hope this rumor is true..
Jim Hamm