The use of special effects on web pages has literally exploded. Special effects are used either to draw potential client's attention to a website or to show off technical expertise. If the answer to all of these questions is yes, then adding special effects to your website can be a good idea.
Some special effects require a plug-in.
Here's a typical scenario. Let's say that some of your visitors do not have the plug-in required to hear the sound. It means that you were thinking more of your corporate image than of your potential customers. Some special effects, such as animation and music, might be cute and impressive at first. However, after the initial impact, it can become irritating.