A component is a set of controls that can be reused across an app in PowerApps. The app maker can define what controls are part of it and what properties it may have.
In this video, learn some of the terminology that you will come across in this video series on reusable components.
For more tips like this, check out the working remotely playlist at www.youtube.com/FoetronAcademy . Also, if you need any further assistance then you can raise a support ticket and get it addressed.