If you are a business entrepreneur or online marketer striving for reaping and optimizing the benefits of online marketing, you need to keep a close eye on the constantly evolving nature of marketing.

In addition to that, online marketing should be complemented with split testing and optimizing so that metrics are improved over a period of time.

From Dmnews.com:

Be granular: Use the power of the Internet to custom tailor your campaigns as much as possible. If you’re buying search ads on Google for blue widgets, then make sure your text ad creative is about blue widgets, and once the user clicks this ad, the landing page should be all about blue widgets too.

Google is not your only friend: While Google is a great way to build your sales, it’s not the only game in town. FaceBook, MySpace, Yahoo and MSN have great self-serve products as well and generally there is less competition on those platforms for you to make a bigger profit, especially if you can be creative.

Bring them back: You may have noticed that after you visit a commerce site, their ads start showing up all over the web whenever you are doing your search for weeks afterward? That is behavioral targeting (BT) at play, and one of this strategy’s major features is retargeting. A number of companies allow you to display ads to users that visited your site but didn’t buy. The idea is to target users that have expressed interest but for some reason didn’t checkout. Give them a better deal in your retargeting efforts.

By having strong metrics, online businesses can outbid competition for ad inventory and spend more on advertising.