How to use Google Sheets
Create a spreadsheet
Edit and format a spreadsheet
Import data sets and spreadsheets
Format numbers in a spreadsheet
Protect, hide, and edit sheets
Edit rows, columns & cells in a spreadsheet
Publish and embed Google Docs, Sheets, Slides & Forms
Add formulas and functions to a spreadsheet
See the sum of cells in a spreadsheet
Reference data from other sheets
Google spreadsheets function list
Create, edit & delete charts
Chart types
See and use suggested charts and analysis in a spreadsheet
Save, print, or import your chart
Turn on notifications in a spreadsheet
Use add-ons & Apps Script
Keyboard shortcuts for Google Sheets
Edit & view text - right to left
Location & calculation settings
Create and use pivot tables
Name a range of cells
Sort and filter your data
Create an in-cell dropdown list
Create series or list
Use conditional formatting rules in Google Sheets
Using arrays in Google Sheets
Separate cell text into columns
Add-ons are independent apps you can add to Google Docs to increase its capabilities.
Here is a list of some of the best add-ons for Docs