This might seem like an irrelevant question (and probably is for the most part), but it's coming up for me quite often, so I figured I'd see what people think.
Mostly relevant when you have multiple pages of the same type that follow the same pattern, i.e. review pages.
For example, a review that covers a sportsbook has sections that repeat across multiple pages, depending on your content it might be something like "Mobile App" , "Live Odds", "Live Streams" and so on.
You will probably want to make your content richer by adding images, so in the beginning of the "Mobile App" (again, this is just a hypothetical pattern) you will have an image that summarizes the app's features. You will call that something like "mobile app features".
Now, on other similar pages in the same section you will have a similar image that's also called "mobile app features" for that app.
These are effectively two different images placed on two different pages that talk about two different apps. But since Google (although I am not entirely sure that's the case) doesn't actually analyze the image itself - would it appear as if you have the same image on all pages?
Stuffing things with keywords is not a good idea, but would it possibly be a better idea to add the brand into such similar image names? Something like "brandx mobile app features". Or does the fact that this image is displayed on a page devoted to a given brand serve as a strong enough indication that the image is related to that brand?