This is a extremely basic question and I feel awful just asking it but:

I'm trying to teach myself Python and I've been reading the stickies.. However when I start saving strings of codes into gedit, the site I'm learning off of tells me to "run the script"

How do I "run the script" through just gedit so it'll pop up in the Python3 terminal in Ubuntu?

I save it as but I have no idea what to do with it.