Gmail has 4.2 billion users. But only 0.1% know how to use it effectively. Unlock their secrets with these 10 hidden tips: 🧵

1) Undo the email you just sent. See below how to undo it: → Settings icon (top right). → Settings > General → Activate the "undo sending" option → Choose 30 seconds

2. Get rid of promotional emails. → Type "unsubscribe" in the Gmail search bar. → Now, select all emails with the unsubscribe label. → Now just tap on the delete button to delete them all.

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