Help with Templates

Hi, As a newbie...

I'm somewhat confused with templates.

This URL, https://blot.im/templates doesn't marry up with this URL: https://blot.im/sites//template, i.e. in relation to the list of available templates.

If I select one of the templates from https://blot.im/templates and choose "Install template" nothing seems to happen (other than the page changing to https://blot.im/sites).

Also what's the significance of the Templates folder on my sites.

Re. the option to download a template, what's the value of that, do I place the files in the Templates directory.

Thanks