Generally speaking, if they're interested, they'll learn better, focus more, and actually take something away from the conversation. 

Some people want you to do the work for them and can't be bothered with learning. Before you start, ask them if they want to learn.

When you're trying to explain a complicated topic to someone, it's best to show what's in it for them. For technology, you can usually play off of people's desire for security, privacy, or simplicity.

You want to find the hook that catches them and go from there. Keep fishing until you find what matters and the rest of the explanation is easy.

Find related information people already know and expand on that. For example, understanding what a blog is can be described as "it's a magazine, but online."  That's incredibly simplistic, but it gets the point across. 

When you understand a concept, it's easy to think of every detail as important, but when you're trying to explain that complicated concept to someone else, you should leave certain details out. 

Your main objective is to get a point across and help someone understand a difficult concept. Strange terminology, names, or specific processes rarely matter.

If you've ever tried to teach someone anything you know it's tough to just sit back while they fumble through it. However, if you want them to actually understand the concepts and learn, you have to let them do it themselves.

Resist the urge to take over. Sit back and let them figure it out on their own.