Google Docs is an online word processor that lets you create and format text documents and collaborate with other people in real time. Here's what you can do with Google Docs:

• Upload a Word document and convert it to a Google document
• Add flair and formatting to your documents by adjusting margins, spacing, fonts, and colors — all that fun stuff
• Invite other people to collaborate on a document with you, giving them edit, comment or view access
• Collaborate online in real time and chat with other collaborators — right from inside the document
• View your document's revision history and roll back to any previous version
• Download a Google document to your desktop as a Word, OpenOffice, RTF, PDF, HTML or zip file
• Translate a document to a different language
• Email your documents to other people as attachments

What about Add-Ons?

Add-ons run inside Google Sheets, Docs, and Forms. They are tools built by developers that literally add on capabilities to your documents or spreadsheets. You can use add-ons to do more tasks within an application. For example, the EasyBib add-on is the easiest automatic bibliography citation generator.