This is the flag of the Kingdom of Denmark, with red as the background color, and a white cross pattern slightly to the left, which is displayed as DK on some platform systems. It generally means Denmark or within the territory of Denmark, and its capital is Copenhagen.
🇩🇰 is the Emoji of a country/region‘s flag, and its meaning is flag: Denmark. The Emoji 🇩🇰 is composed of two regional indicator letters, namely 🇩 and 🇰. The country/region's 2-letter code for Denmark is DK, so the letters corresponding to the two region indicator letters are D and K. 🇩🇰 is displayed as a whole flag on most platforms and as a two-letter symbol on a few platforms.