This is on the site's end. There's nothing you can do really.
The site is UTF-8 encoded. What you are seeing is most likely the result of quote characters that take up multiple bytes internally (three bytes forming the character) represented in a single-byte encoding like ISO-8859-1 (where those three bytes are displayed as three separate characters, and don't make sense.)
This also often happens when content is copy+pasted from Word.
Here is a table of common multi-byte sequences and what they meant to be (the title is german, but the content is pretty self-explanatory.)
This is it:
This happens often when the web site's developer gets the encoding wrong in some part of the process - in the input form, the database tables, or the database connection.