People usually have one of two reactions to spiders of any size. The first is to immediately panic, get the heck away from the spider and beg anyone nearby to kill or remove it. The other is a 'live and let live' attitude that says: "You stay on the ceiling and kill bugs, and we'll leave each other alone."
Myself, I can't stand them, but I know many who swear by them when mosquitoes come by. In any case, if you see a spider at home you want to identify, either because you're scared of them, or you're just curious about them - this guide will allow you to understand what kind of spider you're dealing with. A handy guide to have, so share it around!