GIMP's operations with color profiles seem hard to grasp.
I've studied a question describing experience similar to mine here: GIMP. TIFF. Color profile sRGB IEC61966-2.1 and embedded color profile GIMP - built-in sRGB
I appreciate that answers are technically deep and even develop a bit of an argument, but I'm struggling figuring out the proper strategy.
The embedded profile in my image is "PHL 246E7". I googled that, looks like it refers to a monitor model. Subquestion 1: what's the meaning of the relation between this image and this profile? Something like, "this image would have proper colors when displayed on this monitor, but not necessarily other monitors/printers"?
Then, @xiota recommends:
If the input file had a different profile, like Adobe RGB, you should convert to sRGB since you plan to use the images on the web.
I also plan to use the image on the web. But maybe this "PHL 246E7", whatever it is, is also sRGB, and I don't need any conversion (like @Tetsujin recommends). Subquestion 2. How do I find out whether this embedded profile is sRGB or not?
Then, there's recommendation from @Tetsujin:
I'd still always recommend only ever converting at export
At export in GIMP, I don't see any options explicitly suggesting the conversion of color profiles. I see GIMP has an ON/OFF checkbox to "Save color profile". If I check it, the image is saved having the same "PHL 246E7" embedded, as subsequent opening reveals. If I don't check, GIMP doesn't ask any questions on next opening, so I'm not sure what profile the result really contains, if any.
Subquestion 3: with this option OFF, would the result really be without color profile at all, or with GIMP's built-in sRGB?
Subquestion 4: if it's without, should I consider that to be "bad" for web usage and strive for embedding some color profile?