The Gmail app can automatically summarize those long email threads

Gmail will now automatically show you a summary card for lengthy email threads if you check a Google Workspace account on the iOS or the Android app. The company introduced AI summaries last year when it rolled out Gemini side panels for Docs, Sheets, Slides, Drive and Gmail. However, you'd have had to manually tap the "Summarize this email" option at the top of emails before if you wanted to see a thread's contents at a glance. Now, the summary will show up at the top of the email the moment you open a thread.

Google's AI assistant will write up key points from multiple messages and include them in the summary. It will keep re-generating that summary and keeping it up to date as more replies come in. At the moment, however, the feature will only work for emails written in English. Also, your personalization smart features in Gmail, Chat and Meet, as well as smart features in Google Workspace, have to be switched on. As The Verge notes, Google didn't say whether it will also make auto-summaries available on non-Workspace accounts and Gmail on desktop. But you can always tap the "Summarize this email" option at the top whenever auto-summary isn't available for you. 

In addition to summarizing emails, Gemini in Gmail can help you draft new emails and help you find information from within your inbox or from your Drive files. At I/O 2025, Google CEO Sundar Pichai introduced Personalized Smart Replies, an upcoming feature that can look at your past emails and files to draft a response containing relevant information in the tone you typically use when you write.