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Pixel is just a term of art. Facebook (or whomever) have their JavaScript on the page, which sends information back. Historically, this would be a GET request
by kristjansson 4y ago
Pixel is just a term of art. Facebook (or whomever) have their JavaScript on the page, which sends information back. Historically, this would be a GET request for a 1x1 image, with all the information of interest packed into query params on the request. Hence, the “pixel” colloquialism.