Right Arrow Curving Down

It points at whatever sits underneath: keep reading, look down.

People put it at the end of a caption or post to steer your eye to the link, the picture or the comments below ('full story ⤵️', 'link in the comments ⤵️'). In a chat it works as a cue that something is on its way: a question followed by ⤵️ often means the answer is coming in the next message, and a lone ⤵️ usually means 'look at what I send next'. Some writers also drop it between paragraphs of a long post as a 'continued below' marker.

The arrow itself is older than emoji. It joined Unicode in 2002 as a plain text symbol, in the batch of characters taken from the Japanese standard JIS X 0213, and Japan's mobile carriers already had a matching picture in their phone emoji sets. When the first worldwide emoji set was built from those carrier symbols, the arrow came along with its upward twin ⤴️.