Variables and fields (was: What concept is this?)

In a LibreOffice Writer document, what is the concept called that allows for a variable between the less than and greater than sign? Where is the place I can look to change this variable?

I have this scattered throughout a document that I found.

PREPARED FOR: <CLIENTCOMPANY>

For example if I wanted <CLIENTCOMPANY> to show Acme throughout the whole document?

PREPARED FOR: Acme

LibreOffice 5.3.3.2

RHEL 7.3

Thank-you.

Hello @gctaylor1,

please have a look at “Set Variable” and “Show Variable”,

in the menu "Insert - Field - More Fields - Variables" .

link: Variables

Thanks @librebel for the explanation and link.

Should I expect to see CLIENTCOMPANY someplace? Like in the Select column or Name Value fields back in "Insert - Field - More Fields - Variables" ? I didn’t so it makes me wonder if the author of the doc is not really using variables at all and I should just use Edit - Find & Replace. Maybe not enough information for you to answer. Thanks for getting me this far.