Have you ever wondered how Google’s search got so good? An insightful new video released by Google uses employee interviews and engaging graphics to show how Google’s core search product has evolved since it began in 1997.

While it’s easy to focus on evolving Google products like Gmail and Google+, Google still makes most of its revenues on search and advertising. And its core search product is still one of the most helpful ways to find content, pictures and videos around the web.

The video features short interviews from Google employees such as Vice President Marissa Mayer, Fellow Amit Singhal and Director of Product Management Johanna Wright. Each person helps explain a piece of how Google’s search evolved, including landmarks like AdWords, Google News, image search and Google Instant.

On top of adding new features, Google has stayed committed to delivering better and faster search results over the past few years. In June 2010, Google debuted a new search indexing infrastructure called Caffeine that improved the the frequency of real-time results by aggregating more pages and indexing in half the time. In early November, the company also tweaked its basic search algorithm to promote fresher content, affecting 35 percent of searches.

The image above, which is featured in the company’s blog post announcing the video, can be clicked on and expanded if you want to better see the chronology of search features that have been added to Google over the years.

And, finally, the fascinating six-minute video can be viewed below:

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