By one metric, it worked.

Harris already had some stiff competition for the nomination. Sen. Elizabeth Warren (D-Mass.) made her announcement on New Year’s Eve, itself a rather odd time to do so. While political observers are quite familiar with Warren, 22 percent of respondents in a December CNN-SSRS poll said they didn’t know enough about her to have formed an opinion. And what do people who don’t know much about something do? They turn to Google.

Google’s Trends tool shows that search interest in Warren spiked on the day of her announcement.

What were people curious about? Over the past month, the top subjects about which people were searching for more information about Warren include her heritage (that is, the question of any Native American heritage) and a video she filmed in which she drinks a beer. The locations where she drew the most interest? Massachusetts, Washington, D.C., New Hampshire and Iowa.

On Jan. 11, Rep. Tulsi Gabbard (D-Hawaii) announced her own bid. She actually generated more search interest than Warren on the day after her announcement (which came during an evening program on CNN). That quickly faded.

The most interest in Gabbard came in Hawaii and Washington, D.C., with people looking for more information on her views on Syria.

On Jan. 12, former Housing and Urban Development secretary Julián Castro formally entered the race. His announcement generated less search interest, perhaps in part because he’d made clear in mid-December that he was forming an exploratory committee.

The most interest he saw was in Washington, D.C., and his home state of Texas. People looking for information about him wanted to learn more about his wife and his (twin) brother.

On Jan. 15, Sen. Kirsten Gillibrand (D-N.Y.) announced her candidacy on “The Late Show.” The next day, she saw her peak in search interest — trailing Warren and Gabbard.

Among the top search topics were her age and her net worth. Interest was highest in Washington, D.C., and New York.

Then came Harris.

People wanted to know about her husband; the places in which she was most searched included Washington, D.C. (as you might have expected) and Vermont. California was fourth.

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How much interest did Harris see? That spike was twice the peak that Gabbard saw on the day after her announcement.

In fact, search interest for Harris briefly surpassed search interest in President Trump, who has consistently dominated Google searches since he jumped into politics. His peak over the past week came during his speech Saturday.

(The Google tool only goes back exactly seven days, so it’s likely that Gillibrand saw more search interest earlier in the day on Jan. 16 than is shown on the graph.)

That’s the sort of splash that candidates want to make. There are a lot of other factors that come into play when determining how much attention a launch will get and a lot of other metrics worth considering when evaluating a launch’s success. (Harris, for example, announced that she’d raised $1.5 million in the 24 hours after her launch.)