Shortcake

Cake, dessert or something sweet, in almost any message. The picture is a wedge cut from a round cake: pale sponge, white cream between the layers and over the top, and one whole strawberry on the peak. Most designs keep that shape, so it reads as "a piece of cake" even at tiny sizes.

People use it the way they use the word cake: to show what they just ate, to plan dessert or a coffee-and-cake meetup, to say "treat yourself" after a hard week, or to confess a sweet tooth. Bakers and cafés use it in menus and posts. In English the idiom "a piece of cake" means something easy, and the slice gets sent with that meaning too.

Is 🍰 the same as the birthday cake emoji?

No: 🍰 is plain cake; 🎂 is the birthday one. The birthday cake is drawn whole with lit candles; the slice has none. People do send 🍰 in birthday threads, usually in the sense of "have some cake", but if you want to say happy birthday, 🎂 does it unambiguously.

The slice shows a specific cake. Japanese strawberry shortcake (ichigo shortcake) is a light sponge layered with whipped cream and fresh strawberries, the default cake in Japanese cake shops and the cake most Japanese families buy for Christmas. The emoji came to Unicode from the Japanese phone emoji sets, so it drew the cake those users knew. The name travels badly: in the United States, strawberry shortcake is strawberries and cream on a split biscuit (a small quick bread close to a scone), and in Britain shortcake is a crumbly butter biscuit like shortbread. The emoji means none of those; it means a slice of cream cake.

What does it mean when someone sends 🍰?

Usually "I want cake", "let's have cake" or "this is a treat". Alone it is a craving or a suggestion; with a cup it is an invitation; under a photo it is simply the dessert; after good news it is a reward. The tone is light and friendly, with no hidden edge, which is why it turns up in family chats and work channels alike.