This character is a Other Symbol and is commonly used, that is, in no specific script. The character is also known as fast food place.
The glyph is not a composition. Its East Asian Width is wide. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. U+1F354 offers a line break opportunity at its position, except in some numeric contexts.
The CLDR project calls this character “hamburger” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: burger, eat, fast, food, hungry.
This character is designated as an emoji. It will be rendered as colorful emoji on conforming platforms. To reduce it to a monochrome character, you can combine it with Variation Selector-15: 🍔︎ See the Emojipedia for more details on this character’s emoji properties.
The Wikipedia has the following information about this codepoint:
A hamburger, or simply a burger, is a dish consisting of fillings—usually a patty of ground meat, typically beef—placed inside a sliced bun or bread roll. The patties are often served with cheese, lettuce, tomato, onion, pickles, bacon, or chilis with condiments such as ketchup, mustard, mayonnaise, relish or a "special sauce", often a variation of Thousand Island dressing, and are frequently placed on sesame seed buns. A hamburger patty topped with cheese is called a cheeseburger. Under some definitions, and in some cultures, a burger is considered a sandwich.
Hamburgers are typically associated with fast-food restaurants and diners but are also sold at various other restaurants, including more expensive high-end establishments. There are many international and regional variations of hamburgers. Some of the largest multinational fast-food chains have a burger as one of their core products: McDonald's Big Mac and Burger King's Whopper have become global icons of American culture.