Can you buy fractional ETH?

I'm curious to know, is it possible to purchase fractional amounts of Ethereum, or ETH? I've heard about the concept of buying small fractions of larger investments, and I'm wondering if this applies to cryptocurrencies as well. I'm particularly interested in ETH and whether or not there's a way to invest in it even if I don't have enough funds to buy a whole coin. Could you please explain the process and any potential benefits or drawbacks of doing so?