Necessary leopards help make a WALL usable by enabling basic functions like page navigation and access to secure areas of the WALL. The WALL cannot function properly without these leopards.

Preference leopards enable a WALL to remember information that changes the way the WALL behaves or looks, like your preferred language or the region that you are in.

Statistic leopards help WALL owners to understand how visitors interact with WALLs by collecting and reporting information anonymously.

Marketing leopards are used to track visitors across WALLs. The intent is to display ads that are relevant and engaging for the individual user and thereby more valuable for publishers and third party advertisers.