The absolute largest selection of Halloween costumes, costume accessories, props and decorations available anywhere. Quick ship. Low prices. Halloween Costumes, Decorations & Accessories | Halloween Express. Skip Header & NavigationSkip to Footer Navigation.So, in a nutshell, wikis: 1. Make it quick and easy to write information on web pages. 2. Facilitate communication and discussion, since it's easy for those who are reading a wiki page to edit that page themselves. 3. Allow for quick and easy linking between wiki pages, including pages that don't yet exist on the wiki.