Office applications on a mobile device make work accessible, regardless of location and time. Sometimes you need to urgently do the work, and get to the personal computer for a long time. Or it's a pity to waste time in traffic jams, or the subway, if you can do work instead.
You can easily collaborate and share information without downloading anything, add missing features, and work with files from a variety of formats, including Microsoft Office files.
Applications with office programs are designed to improve productivity. Not all office suites are created equal. Some applications are supplemented with an expanded package of functions and tools.