Gemini Complete Guide 2026

Setup to Advanced Agent Use — by Ellis Trent

If you use Gmail, Google Drive, Docs, Calendar or an Android phone, an AI assistant is already at your fingertips. This guide shows you how to put it to work, from simple questions to deep research, image and video creation, and agents.

Checked against official sources in October 2026, it includes:

• Getting started on the web, mobile and the new Mac and Windows apps
• The official UK prices for Google AI Plus, Pro and Ultra, and what each includes
• A clear tour of the interface, the model picker, Canvas and Temporary Chat
• Prompting with worked examples that use your own email, files and calendar
• Gemini 4 Argon, Deep Research, Skills (which replace Gems), Gemini Live, Nano Banana images, Omni video and Lyria music
• Which agent features, such as Spark, Gemini Agent and Daily Brief, are available in the UK, and which are not yet
• Real uses for writing, work, study and small business
• Privacy settings, including Keep Activity, plus safety habits and troubleshooting

Plain British English, no hype, and honest about limitations and US-only features.

What you get: an instant digital download in two formats, PDF and EPUB, so you can read on any computer, tablet, phone or e-reader. First edition, October 2026, written in British English.

This is an unofficial guide, not affiliated with Google or Gemini. It is not endorsed or sponsored by them. All trademarks belong to their respective owners.

This guide is for educational purposes only and makes no promise of income, earnings, sales or results.