I am guessing you are talking about Milwaukee Police. C10/Advised basically means they resolved a situation without a paper report being taken. So if they went to a loud music complaint and C10'd it, it basically means they told the people playing the music to turn it down. This is usually given for "Trouble with Subject" or "Family Trouble" calls.
Be specific in your posts. Luckily someone familiar with MPD codes could answer your question, but there are 72 counties and 1000's of radio systems you could be talking about.