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Where do sources such as alexa, compete, etc collect their data from to build internet statistics such as the top websites and websites' most visited from countries list?

Brian Tompsett - 汤莱恩
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Vish
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1 Answers1

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These sites gather raw data by tracking behavior of their users for data-collection, and performing some statistical fudging to get traffic estimates.

In Alexa's case, it gathers from Alexa toolbar users' data. Compete does the same, but with a larger and more broadly defined "panel" of users.

Scorpion
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