What do they have in common Word PowerPoint and Excel?

Answer 1

Lots of things. They are all applications made by Microsoft for their Office Suite. While they each have their particular purpose, there are lots of things that work the same in them. Things like formatting, shortcut keys, ribbon layouts etc. are all similar where possible. There will be lots of familiar elements to each other in all three of them. This makes it easier to use any of them, as things can work in the same way.

There are things you could do in any of them, like type text or do calculations, though you would use the most appropriate application for your needs. So, for example, while you could have a table of figures and do calculations on them in Word and also in Powerpoint, that is best done with Excel. As they are all part of the Microsoft Office Suite, it is possible to copy data between them and link them to each other. There are many other facilities that are available in all three applications, like graphics, which you can use.