What ␊ means
␊ pictures LF; it does not perform a line feed. In 1905, Murray's message printer used one control to return the print head and advance paper. By the 1910s, related systems split those motions into carriage return (CR) and line feed (LF). A 1969 ASCII standard defined LF as moving the print position down a line; whether that made a “new line” depended on agreement. In 1975, ISO 2047 standardized visible signs for controls that normally do not print.
Technical displays use ␊ to show a normally invisible control.
Don't confuse it with
1Questions people ask
1Can ␊ make a real line break?
No. ␊ is a graphic character; a working line break needs an LF or another control value recognized by the application.
How to type ␊
␊\240ACodes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.

