Do you ever feel like on-chain transactions are sometimes just like waiting in line to buy bubble tea? You clearly stand in line, but someone from the side "cuts" in and gets served first by the clerk... MEV, in simple terms, is about who gets to order the transactions first; whoever can do it faster and who can pay more tips gets priority.

The most directly affected are ordinary people: slippage suddenly increases, the transaction price is pushed up a little, or just after you confirm, you find out you've been front-run, it’s not a lot of money but it’s annoying.

Now I get a bit nervous when I see popular pools; I’d rather earn less than compete with bots for speed.
On the macro side, they’re talking about rate cut expectations, the dollar index, and the mood of risk assets rising and falling together.
On-chain, it’s even easier to get squeezed, and more front-runners will just appear.
Anyway, my principle remains: if you can set a limit order, do it; give less authorization; double-check the address before signing; taking a little more time is better than paying tuition.