I was at the Photo Marathon that my friend introduced me to use Adobe RGB instead of sRGB. Since i'm not into printing photos, it's really hard to see the difference. Based on some read ups, Adobe RGB covers a bigger spectrum /gamut of colors, where cyan and green looks better. However, it seemed like most browsers do not support it.
One funny thing, I was stunned seeing that the pictures downloaded had a different prefix.
It was _MG instead of IMG.
Now that it explains.
_MG was taken using Adobe RGB.
IMG was taking using sRGB.