A major sticking point with moving from Excel to Google Sheets was the lack of ability to use macros. A macro will let you automate calculations and other aspects in spreadsheets. For instance, if you regularly tally up marks, allocate a grade and then draw a graph or chart of the results for your class, the you can create a macro to do this for you. Google Sheets now have the capacity to write and run you own macros. This will increase your efficiency and save you time.