What can I do in Docs?

The usual tools of a word processor:

• Headings and styles, lists and checklists
• Tables, images, links, equations, footnotes and a table of contents
• Page setup: paper size, margins, headers, footers, page numbers and watermark, under File → Page setup
• Comments with @mentions, and Suggesting mode for tracked changes
• Live data from a spreadsheet: Insert → Smart chips → Linked spreadsheet
• Word count and Find and replace
• Templates such as meeting notes, resume and cover letter on the Docs start page
• Spelling and grammar checked as you type. Add your own words under Tools → Spelling and grammar → Proofing settings

The list of keyboard shortcuts is under Tools → Keyboard shortcuts