The Awen (pronounced ah-when) is an important symbol in the Druid traditions. The word itself is a Welsh, Cornish and Breton word for poetic inspiration. It is an inspirational muse for creative artists of all sorts.
The three beams are said to be three beams of light drawing down from three dots that are representative of the triple aspect of diety and also, the points at which the sun rises on the equinox and solstices (the Triad of the Sunrises).
The lines represent not only inspiration but the inspiration of truth. In other traditions the beams are said to represent Sea, Air and Earth; Body Mind and Spirit or Love, Wisdom and Truth.
The Awen can often be found surrounded by circles. These circles are said to be representative of the cyclical and timeless nature of creation.
I hope this little blurb has helped you to understand a very common symbol in our Druid tradition.