Page Insight doesn't correctly ask you to optimize images. How to tell him that the size of the picture should be just that?

Question

Google

Google gives me 50 out of 100, while telling me to optimize the images to the utmost, and changing their size. Followed the recommendations and replaced a couple of banners. As a result, their actual size has changed a lot. That is, I have a block with banners with a width of md-9, and inside, respectively, images (screen 1)

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What Google suggested is 287x131. (screen 2)

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The question is how to save normal pictures and type at least 75 in Google. I can’t do anything about the rest of the points, the response from the server does not depend on me in any way, I won’t enable the browser cache for scripts from other sites. I'm sure that it's only in the pictures (screen 3)

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How did you deal with such problems? Thank you)

Answer 1

I went to your site, saw a picture, this one , in 1900 resolution (original) and 778px actual details .
I looked at what images Google offers to download ... for some reason it reduced it to 628px (why exactly, to such a width - I find it difficult to say), but obviously not 278px.
And because this picture (*here I mean the picture that you give as an example) is already on your site in the size of 278px, it’s hard to say why and why Google reduced it so much (and it’s simply not possible to check at the moment). But, I would venture to suggest that this picture is exactly at the same link, it is used somewhere else on the site, and there it is just in this resolution.