My question is, What was the function of a capacitor in an electric current?

Could someone please help me I ruled out one of my theorys already and that was to increase circuit power.

Was it to allow current flow between its plates?
Was it to measure the amount of current in the curcuit?
or Was it to store electric currents?

2 answers

What? this website says its an expired webpage.
http://www.google.com/search?q=what+is+the+function+of+a+capacitor+in+an+electric+current&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a