Multiple dots/periods in CSS

Question

Can one of you CSS experts explain this designator (if that\'s even what you\'d call it) to me? I understand the contents, just not the a.button.gold. Two dots?

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Answer 1

This means, the background color specified will be applicable to all tags whose "class" attribute has a value of either "button" or "gold".

For example, if you have a tag

Button

and another tag

Gold

then, the background color for both the classes will be the same specified one.