Float is a CSS positioning property. If you are familiar with print design, you can think of it like an image in a layout where the text wraps around it as necessary. In web design, an image that is floated remains a part of the flow of a web page. That means that if it changes in size or if the elements around it change, the page will automatically adjust (reflow). This differs from page elements that are absolutely positioned. more about CSS-Floats