What is the `score` mean in json api?

What is this score mean in JSON api? How does it been calculated or what is it value related?
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Hi @kongtaoxing welcome to Discourse Meta :wave:

Please use search first when looking for support solutions.

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In this case the first topic in search results will likely contain your answer:

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You can see a bit more detail about what it counts and how it’s calculated here:

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