GoTo.com (renamed Overture in 2001, and acquired by Yahoo! in 2003) created the first search advertising keyword auction in 1998.[21]:119 Google launched its "AdWords" search advertising program in 2000[22] and introduced quality-based ranking allocation in 2002,[23] which sorts search advertisements by a combination of bid price and searchers' likeliness to click on the ads.[21]:123


In the 2000s, with increasing numbers of Internet users and the birth of iPhone, customers began searching products and making decisions about their needs online first, instead of consulting a salesperson, which created a new problem for the marketing department of a company.[15] In addition, a survey in 2000 in the United Kingdom found that most retailers had not registered their own domain address.[16] These problems encouraged marketers to find new ways to integrate digital technology into market development.
To better understand the concept of a sales funnel and just how you can implement it in your own business, let's look at the following image from Shutterstock. On the left side of the image, you see a magnet. That magnet is attracting customers, which happens a number of ways. From blogging to social media to paid ads and everything in between, how the visitors arrive to your website has some impact on the success of your funnel. 
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