What difference between /plugins.local and /plugins?

What difference between /plugins.local and /plugins ?

I can not find topics/wiki/doc

Wiki: Plugins

TL;DR: plugins.local (also themes.local) are for custom plugins (themes). Prevents them from being overwritten when TT-RSS is updated.

And if I read the PluginHost source code correctly any plugin with the same name as in plugins will be overridden by the one in plugins.local.

Thank you!

¯\_(ツ)_/¯