Watch my video and watch how “not” to swirl your wine and my simple and idiot-proof swirling technique.
“Why do we swirl wine? To allow oxygen to get into the wine: Swirling releases the esters, ethers, and aldehydes that combine with oxygen to yield the bouquet of the wine. In other words, swirling aerates the wine and gives you a better smell.”
Some people say that you should only swirl wine if you don’t like the way your wine tastes. I disagree. I feel like you should taste your wine first and that a little swirling will actually improve the taste of any wine. I am not an expert though.
If you want to get real fancy, learn about decanting here: