The Internet makes it easier both to target potentially interested consumers and to communicate with them.

ECONOMIST: Electronic commerce

The site doesn't collect a lot of demographic data on its users, but Mr. Gottfrid said there is an opportunity to target ads based on the content a user is interested in.

WSJ: Tumblr's President Resigns

Powerful behavioral and marketing analytics, can help you easily target and segment your customers, understand what they are interested in, and then engage them at the right time with the right message.

FORBES: Helping Sales Succeed Through Better Automated Marketing

The Levo League may primarily target women professionals, but it turns out that men are also interested in its services.

FORBES: Warren Buffett Wants To Be Your Mentor

Vivendi then lowered its premium target from 20% to 12% in an attempt to seek an interested party.

FORBES: World Of Warcraft, Guild Wars 2 And Vivendi: Activision's Achilles' Heel

In addition, marketers can target those ads bought via exchanges directly to people who are likely to be interested in their product or service, regardless of the context of the site where they appear.

WSJ: Deluge of Content on the Web Swamps Yahoo

It gives you the ability to know who is interested in your products and services (because they have opted in) and allows you to target that community.

FORBES: Facebook Vs Twitter: Do You Have To Choose?

The Navy became interested in such defenses for its ships later, but in the 1950s there was no practical way for Russia to target U.S. warships at sea with ballistic missiles, so the sea service too had other priorities.

FORBES: Missile Defense Becomes A Navy Mission