Magick is the science and art of causing change to occur in conformity with the will. An example of this would be to visualize the desired effect, empower it with energy and intensity ... and sent it out into the universe. The universe will work for us for the desired effect as we work for the desired effect as well.
A Magick Circle is the creation of sacred space in which we, the magickal practitioners, will perform our magickal workings. For us the Magick Circle also refers to our meetup group which is a group of people focused on a common interest; and in this case our focus and purpose will be on the use of Magick to make changes in conformity to our will. Make changes for the good in every aspect of your life. Make changes for the common good.