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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. …