Dreamweaver behaviors allow visitors to interact with web pages by triggering actions with events. Behaviors add interactivity like making elements appear, fade, or change color. Image hotspots create invisible link buttons on images to lead to other pages. Behaviors are pre-packed JavaScript programs that add interactivity easily. Common behaviors include appearing/fading, highlighting, sliding, and growing elements. Behaviors are applied by selecting elements, choosing actions and events, and can be removed or edited. Special attention needs to be paid to uploading associated JavaScript files for behaviors to work properly on servers.