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A cache is a local copy of a file that exists elsewhere. Caching can take place in the browser, on a dedicated machine on a network, or at an ISP.

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How does hash in file name affect google image search ranking?

In terms of cache optimization it is recommended for static files like images to cache them forever. … Situation 1 I don't cache image files. So if I update the file myimage.png the file name remains the same. Situation 2 I cache image files forever. That's why I use a hash in the file name. …
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