How do I use labels in Gmail?

Last reviewed: September 23, 2026 · Markdown version

"Labels are different from folders" is the line Google puts near the top of its labels page, and everything useful follows from it. That page, Create & manage labels in Gmail, spells out the consequence: "When you delete an email, it's removed from every label and your inbox" (Create & manage labels in Gmail, read 23 September 2026). A folder holds a message; a label describes one. One email can carry several labels — Gmail's Android steps have you "Check the boxes next to the labels you want to add" (Create & manage labels in Gmail (Android), read 23 September 2026) — which is why the same email can be both Tax and 2026.

If you want the mechanics — creating, nesting, colouring — that is the other page. This one is about what to do with them.

The three things labels are genuinely good at

Marking mail you will need later but not now. Receipts, warranties, tenancy documents. Label it, archive it, stop looking at it. Archive plus label is the closest Gmail gets to filing: an archived message "no longer appears in your inbox, but you can still find it under the 'All mail' label" (Archive Gmail messages, read 23 September 2026).
Cutting across categories. A Trip label can hold a flight confirmation, a hotel receipt and a message from a friend — three senders, three categories, one view. No folder structure does that without duplicating something.
Giving a filter somewhere to put things. Labels come into their own when they are applied automatically. A Gmail filter can "send email to a label, or archive" it (Create rules to filter your emails, read 23 September 2026), and a filter built from a search that labels and archives is the one Gmail setup that reduces future work instead of present mess.

Three habits that keep them working

Fewer, broader labels. A label you have to think about before applying will not get applied. If you cannot name it in one word, it is a search, not a label. Gmail allows far more than you need — "You can create up to 5,000 labels" — but Google's performance advice to Workspace admins is to "stay under 500 labels (including sublabels)" (Gmail is slow for my users, read 23 September 2026).
Nest instead of prefixing. Gmail lets you put one label inside another with "Nest label under", so Work/Invoices sits under Work instead of twelve top-level labels starting with "Work —".
Label the sender, not the message. Anything worth labelling twice is worth a filter, because the same sender will send it again.

What a label can never do

It cannot reduce anything. Labelled mail is still received, still counts against the storage Google Drive, Gmail and Google Photos share, and still arrives tomorrow. Google's storage page is blunt about where that ends: "If you're over your storage quota for 2 years, we might delete your content across Gmail, Drive, and Photos" (Manage your storage in Drive, Gmail & Photos, read 23 September 2026). A tidy label tree on a full account is a well-organised problem.

And a label is not an unsubscribe. If the honest answer to "why is this here" is "I do not want it at all", labelling it is the expensive way to keep receiving it. Unsubscribing, and when it backfires.

Where we fit

Labels answer "where should this go". Adinand Email Cleaner answers the question underneath it — who is sending all this. It groups Gmail by sender, shows the measured space each one is taking up, and lets you clear a sender in one decision instead of eighty. The rules it creates are real Gmail filters made through Gmail's own API, so they run inside Gmail and keep running even if the app is deleted. All email processing happens on your device; there are no servers of our own for your mail to pass through.