This character is a Other Letter and is mainly used in the Hangul script. The character is also known as B.
The glyph is not a composition. Its East Asian Width is wide. In bidirectional text it is written from left to right. When changing direction it is not mirrored. U+1107 forms a Korean syllable block with similar characters, which prevents a line break inside it. The glyph can be confused with 78 other glyphs.
The Wikipedia has the following information about this codepoint:
Bieup (character: ㅂ; Korean: 비읍) is a consonant of the Korean alphabet. The Unicode for ㅂ is U+3142. It indicates a 'b' or 'p' sound, depending on its position. At the beginning and end of a word or syllable it indicates a [p] sound, while after a vowel it designates a [b] sound. For example: it is pronounced [p] in 바지 baji ("trousers"), but [b] in 아버지 abeoji ("father").