Jumping spiders have good vision and use it for hunting and navigating. They are capable of jumping from place to place, secured by a silk tether. They do not build webs and hunt by stalking their prey and pouncing on them.
The danger of spider bites is greatly exaggerated. Most spiders are NOT dangerous to man under normal conditions, and only a few species are of public health significance. Spiders are frequently misunderstood; they are non-aggressive and most will not bite unless provoked or threatened, and even then only the larger species are capable of piercing human skin with their fangs.