answer:There are a number of issues with the use of quotes on the Internet: 1. Many modern programming languages use quotes to specify strings. As a result, they must be escaped when they occur within strings, and they are not always escaped properly. 2. Even if they are escaped properly on the back end, quotes must be represented using the character entity " when they are displayed or else they may cause HTML or XML parsing errors. 3. Quotes are not valid characters in HTTP URLs, so they must be encoded as %22. 4. Many people use so-called smart quotes (often when copying and pasting) which are not part of the ISO 8859-1 character set. These curly quotes (and any other characters outside the ISO 8859-1 set) will show up as question marks on systems that do not support UTF-8.