[ic] The [component] tag

[Zambra]

Hello,

I've installed Interchange 5.2.0, and I'm trying to customize it (just on
the template side, I don't need additional or modified features). I'm
dissecting the template files for the Foundation store, but don't understand
what:

[component group=vertical]

does mean.

Although "component" doesn't seem to be explicitly documented in the docs, I
guess this tag calls the component file. But, what does the
"group"-parameter mean? Also I can't find any component called "vertical".

Thanks in advance for your help!

Miguel