when i use google sheet image function, then i found image's resoltion lower.

so i test 3 case.

case1 : image function use, hosting site 1(not google) case2 : image function use, hosting site 2(not google) case3 : google sheet image insert(insert -> image)

and i found only case3, there isn't low resoultion problem.

how can i do?

*here google sheet url that i tested

but keep in mind that the original size is 1266×420

so to get the original it would be:

=IMAGE(B2, 4, 420, 1266)

your C2 cell dimensions are 572×200 so for such a small cell it's best to use a smaller source. you can use

and some online resizing tool like