What's the real-world usage of a TPM module?

[Fernando Cassia]

Since my last system includes a TPM I'm curious as to what is the real
world usage of it in Linux.
I've read that Truecrypt choose not to use TPMs....

So, anything else? using it to encrypt my Mozilla password store?

I have to say that the first result of a Google search seems a bit
convoluted and intimidating to the uninitiated
https://www.grounation.org/index.php?post/2008/07/04/8-how-to-use-a-tpm-with-linux

TIA for your collective wisdom...
FC
-- 
During times of Universal Deceit, telling the truth becomes a revolutionary act
- George Orwell