This is the national flag of The State of Eritrea. The surface of the flag is composed of three triangles. Near the flagpole is a red isosceles triangle. In the red part, there is a circular pattern composed of three yellow olive branches, which is displayed as ER on some platform systems. It generally means the country of Eritrea or the territory of Eritrea, and its capital is Asmara.
🇪🇷 is the Emoji of a country/region‘s flag, and its meaning is flag: Eritrea. The Emoji 🇪🇷 is composed of two regional indicator letters, namely 🇪 and 🇷. The country/region's 2-letter code for Eritrea is ER, so the letters corresponding to the two region indicator letters are E and R. 🇪🇷 is displayed as a whole flag on most platforms and as a two-letter symbol on a few platforms.