This character is a Other Letter and is mainly used in the Hangul script.
The glyph is a compatibility version of the glyph Hangul Choseong Hieuh. Its East Asian Width is wide. In bidirectional text it is written from left to right. When changing direction it is not mirrored. U+314E offers a line break opportunity at its position, except in some numeric contexts. The glyph can be confused with one other glyph.
The Wikipedia has the following information about this codepoint:
Hieut (character: ㅎ; Korean: 히읗; RR: hieut) is a consonant letter (jamo) of the Korean Hangeul alphabet. The Unicode for ㅎ is U+314E. It has two pronunciation forms, [h] at the beginning of a syllable and [t̚] at the end of a syllable. After vowels or the consonant ㄴ it is semi-silent.
It sounds like [h] in an initial or (total or full) onset position (하), intervowel position (partial onset (아하) or coda with a previous vowel in the same syllable block and followed by an onset vowel from another block (아[...]아앟아) or pseudonset (앟아)) and in a coda following a consonant (받침) before an onset vowel in the next syllable (않아). It assimilates via aspiration codas before plosive consonants; if ㅎ is a full coda (the end of the speech temporarily or finally) or batchim, it would sound like [t̚] (앟 at).