Office applications have been a valuable productivity center for many years. We use them for a wide variety of purposes, including writing documents, creating spreadsheets and presentations, and keeping track of what's going on. No productivity suite is complete without them, and just about everyone uses them, even kids.
The atmosphere of the office suite has not changed much over the past few years. Existing applications have improved over this time. On Android, there are separate lists for spreadsheet apps and Word apps if you want to see your options at a more granular level.
The applications come with a full suite of office applications, including a word processor, spreadsheet function, presentation application, and a few other things. You also get a drawing app and an equation editor (for your spreadsheets). They support most file types. Editors and processors are more than powerful enough for most things.
Apps get new features and updates. They have the basics like word processing, spreadsheet editing, and presentation editing.