In the bottom of syllables, this character is like the English ‘ng’ without the ‘g’ sound. At the beginning of syllables, this character is just a place marker and has no sound. For example in 안녕하세요 (annyeoNGhaseyo), there are three ㅇ's notice that there is a ㅇ at the beginning of the block 안, at the end of the second block/syllable 녕, and at the end of the word 요? *** The first and last syllable/blocks, the ㅇ is silent and only the vowel is sounded. In the second the syllable the ㅇmakes the "NG" sound. **Hope I didn't confuse you! ^-^ 행운을 빕니다!

The extra "ㅇ" or "ㅁ" is nasal accent and kind of cute way of speaking in slang. For example: 뭐행, 뭐햄 (which mean 뭐해)

ㅇ is always silent if it's the first letter in the syllable. Syllables always start with a consonant, so if you just want to write or say a vowel, you need to put ㅇ first. 아 = A 앙 = Ang