So what is the Internet? My answer is probably very close to your answer and the majority of the several billion people connected to it.
In each industry vertical, many competitors are taking advantage of the continual emergence of new channels, platforms and touchpoints. Through these touchpoints, relationships are established and nurtured, in turn, engagement and loyalty is increased.
Search retargeting, this is how it works; A consumer searches for products or services on a search engine, data is collected based on their keywords, identifying them as a customer prospect, the display network technology allows you to exhibit an ad to that consumer as they browse the Web, this allows the consumer to click on your ad and visit your website in relation to something that is already TOMA (top of mind), introducing them to your purchase funnel.