a few good things about using flash are you capture things that you cant see when thee lioght gets dim. a ouple abad thingfs are you lose all thee natural beauty of what light you do have. some photos come out to bright and you look all greasy and gross, or youn may have to much light and wont be able to see anything at all. flash can make photos better or worse, it just depends on how you use it.

flash is good when its around evening time and there is hardly any light to work with. also when no one else is using it.

flash is not good during a bright sunny day, especially if your in thee shadows with a bright back ground

this photo is good without flash because it gives off its own light and lets you see only as much as it wants you to. if there were flash you wouldnt think the same things your thinking about it right now.