Images and Pictures
Images and pictures are a big part of web design and their visual appeal. They must be optimized for web format based upon file size and quality. They add visuale effects to a rather bland scene.
They can add great apeal to a site or a great burden to those with low speed connections. Images must all ways be formatted for both speed and quality. It takes a seasoned designer to know the difference. it only comes with expeirence and time.
If an image is to big it can take a long time to download and many users will just look else where. An image of such poor quality will do the same even if it has a fast download time. A good designer will be able to tell the diffference.