Something less known and discussed when in comes to meta descriptions:
Don’t include double quotation marks (“…”) in them. Google’s search engines understand double quotation marks as HTML code and this can result in your meta description becoming truncated at the first quote mark, meaning the search engines will cut off the end of the description and replace it with an ellipses and users won’t be able to read the entire text.
So avoid double quotations and most other non-alphanumeric characters unless they are inserted using the HTML entity code. However, if you feel that the use of quotes in your meta description is absolute necessary, be sure to use HTML entities solutions.