As we all know, traditional spreadsheet applications are locally available on personal computers. They need to be installed and inevitably consumes some Disk Space. Most documents created are stored on the same computers (unless stored in cloud drives or transferred through portable storage).
However, in an Online Spreadsheet, the exact opposites are done.
To elaborate, Online Spreadsheets (like GoogleSheet) does not need to be installed locally, does not consume significant Disk Space, and documents created are easily accessible anywhere you go(as long as there is internet connection). Actually, there are still more but will show it later.
Since we are taking about its convenience, personally comparing its usage versus the traditional way would greatly prove what I am trying to explain above.
Try it for yourself!
Google Sheet Tutorial 