What is meant by a 'tag' with regards to transmitting a MAC? What is meant by a 'tag' with regards to transmitting a MAC?

Are there multiple meanings within cryptography?

Update - take this for example:

$Bob \to Alice \Rightarrow m\ ||\ h(m, ``secretTag")$
A tag or authentication tag is something that is attached to (tagged along with) a message. It provides integrity and authenticity to the message.

Tags are also calculated for authenticated ciphers (AEAD ciphers, such as GCM). They can in that case be calculated by an internal MAC algorithm, but this does not have to be the case.

The size of an authentication tag can usually be configured. The size must be predetermined before use however (or an attacker can simply try and crack a shorter authentication tag). Usually the size is between 64 and 128 bits (128 bits being the block size of e.g. AES), although hash based tags may be larger than that.

A tag is usually placed at the end of the ciphertext. It can however in principle be communicated or placed separate from the ciphertext.

I'm not aware of any other meaning of the word "tag" or "authentication tag" within cryptography.