The aces in the tarot are all indicative of new beginnings. When you draw any of them, it means that you are at a point in your life where a new cycle is beginning - you are about to start afresh. Each of Ace has an important message behind it, we have reimagined the art to fit in our actual times, and surpass our expectations.
The Ace of Cups shows abundance, the cup overflowing is a sign of love and emotions, time to let loose of whatever emotional baggage you have and start living your life to the fullest. Like with all the other aces, there is a new beginning that is indicated here - a chance to start fresh. It might come in the form of opening yourself up to the possibilities of new relationships, romantic or otherwise, that can make you emotionally fulfilled. The release indicated is either be spiritual or emotional, depending on what you are going through.
The Ace of Cups may come to you after a long period of being lonely or enduring something that deeply hurt you emotionally, and its appearance may be there to herald the turning over of a new leaf.