I am aware of what we use it for - I am just not sure on the how... apart from what I have read in the docs.

We're currently running 5.4.2 and I'd like to upgrade to (at least) the latest 5.4 offering - as that seems as if it would be the easiest and safest option.

So I am hoping I might get some direction, please - on the way forward for an upgrade.
The documentation seems OK if you're upgrading minor versions... but I couldn;t find anything about upgrading patch versions.

Thanks!