This is the flag of Montserrat, a British overseas territory. The upper left part is the British flag (
🇬🇧), and the right side of the flag is the national emblem of Montserrat. The woman in the national emblem is the incarnation of Irish women, and the golden harp is another symbol of Ireland. This reflects the Irish ancestry of the this land. It generally means Montserrat or within Montserrat, and its capital is Blaise.
🇲🇸 is the Emoji of a country/region‘s flag, and its meaning is flag: Montserrat. The Emoji 🇲🇸 is composed of two regional indicator letters, namely 🇲 and 🇸. The country/region's 2-letter code for Montserrat is MS, so the letters corresponding to the two region indicator letters are M and S. 🇲🇸 is displayed as a whole flag on most platforms and as a two-letter symbol on a few platforms.