Yes! O3 is ozone while O2 is oxygen. I believe I read an article online that said you can smell ozone right after a lightening strike during a thunderstorm - however I’m not 100% sure. There is also ozone treatment in dentistry so some might have tasted it there. However, most people probably don’t know what ozone tastes like.
An important point we can make here is with the -y at the end of the word. Generally, English speakers add a y to the end of a word to turn it into an adjective - even if it’s not a real word! Some other examples are filth - filthy, slime - slimy, etc. etc. So if you see a “y” attached to the end of a noun, chances are it’s an adjective :)