- The old advertising model took a "spray and pray" approach where advertisers would do wide reaching campaigns with a target audience in mind, but with no specific way to know that they were reaching said audience.

- Advertising on the Internet means that advertisers and marketers can get detailed data on who is viewing their ads and what, if any, action they're taking.

- AT&T spent $8 million on Google AdWords advertising in June 2010 alone.

- Check out our 12-part video tutorial series on using Google AdWords.

- LBS takes it one step further by reaching consumers when they're in a purchasing situation.

- Gartner says LBS is a $1.9 billion dollar business and projects it will hit $3.8 billion by 2012.

- Loopt has created the Loopt iPhone app and Loopt Android app which lets users share their location with friends and family.

- foursquare lets users "check in" to locations and lets advertisers, marketers and establishments offer deals and coupons.

- Gowalla is another good LBS, but it'll prove difficult to unseat the incumbent Foursquare.

- Facebook, with its huge user base, is getting into the LBS game with Facebook Places.

- User review site Yelp has added site check-ins to its bag of tricks.

- Shopkick offers location based services within an establishment; you'll see a different coupon or offer depending on which store department you're currently browsing.