Learn English – What do you call this thing that comes with any Apple product

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I bought a MacBook Pro, and it came with this thing:

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I don't know how to use it or where should I stick it, that is why I need to ask about it in any Apple forum. Unfortunately, I don't even know the name of it. What is this called?

Best Answer

As FumbleFingers said in a comment:

Some people might call it a decal (2. A decorative sticker) Amazon sells them as decal stickers.

My immediate thought (even before seeing the image) was "decal".

"Sticker" is a great word and it is perfectly accurate but "decal" (Google Image search) has the added meaning (in my head, at least) of being a simple image, often a logo.