Makes my files and documents available across platforms

While preparing documents I often update and edit them over a period of time when I may have only my phone or my iPad or I may be at a desktop PC. By keeping them I one place I am not forced to merge documents.
I also used this in graduate school on shared projects because we could all edit the same document and not be required to retrofit multiple versions.

flyfishinphil about Google Docs, v1.2017.442