I have been messing around with my meta descriptions, trying to make them more unique by showing relevant data from the database.
But when I check the meta description by right-clicking in Firefox and showing the page source, the meta description tags is in red color, making me think I have made some kind of mistake.
What does the red text usually mean?
2 attributes are usually the most important one in meta tags: name and content
so description tag may look like
You probably forgot to close the double quotes, or using quotes-wrapper word in content attribute ?
in which case source viewer does not validate the code.
This is also valid for single quotes. If your meta tag uses single quotes and there’s an apostrophe inside content attribute..