Many people decide at some point in their lives to join an organisation that has a specific set of aims that are close to their heart.
These organisations do not have as their objective the making of profit, nonetheless, since they often carry-out fund-raising activities, spend money that they receive and indeed may have employees running the organisation, they are subject to legal and fiscal rules that must be adhered to.
Most countries have special rules adapted for not-for-profit organisations which may exclude them from various forms of taxation, but in order to qualify, they must be established according to local laws.