Advertising vs. Search optimizing

If you are comparing between advertising and search optimizing, there's a whole lot of difference out there. But what are the things that makes them very different since there's one thing in common for both of these schemes, and that is to gain more visitors, targeted traffic and customers as well. Let's compare between the two:

1. Advertising is a scheme where you will promote one or more sites to different sites which you will stick around and gain some customers. This only focuses on traffic, not letting you get up to the SERPS.

2. Search optimizing is a scheme where you promote backlinks and to juice up your rankings by means of link building. You're not only gonna focus on traffic, but also increasing your site's popularity.