How much is 1 Tezos?

Could you possibly clarify for me, how exactly do we determine the current value of 1 Tezos? I've been hearing about this cryptocurrency quite often, but I'm still not quite sure how to interpret its worth. Is it based solely on market supply and demand? Or are there other factors that could potentially influence its price? And also, is there a reliable source where I could check the real-time exchange rate of 1 Tezos? It would be greatly appreciated if you could provide some insights into this matter. Thank you in advance for your assistance.