What RebYidd23 meant is that by putting the symbol in his post
(known on the CR as “backtick,” and found next to the 1 key)
on either side of text, any HTML instructions in the text will be
ignored. The same effect can also be done with <code>, but
there’s no reason to type it out when you can use backticks.
The actual name of the symbol is “grave accent.”