Permanent props

I am a noob at my Gmod server and facepunch. I was just wondering, How do you add permanent props into your Gmod server?
P.S i run a DarkRP server.

Isn’t there some addon called permaprops?

Yea only in but i only know how to put addons into your server with steam workshop.

Right click on prop and Persist.

What do you mean by that?

Hold C, right click on a prop, click the Persist button.

And then what do you do? or what happens?

When you change the map or restart the server, it will still be there.