"Property and the right of inheritance shall be guaranteed. Their content and limits shall be defined by the laws.-- Property entails obligations. Its use shall also serve the public good."
Article 14 protects the right to private property. Nobody is allowed to take away what does not belongs to them. The state may dispossess someone of a property but only in exceptional cases. For instance, when a vital road has to be built, but someone's land is in the way, the state can claim the property, but must compensate the individual for it.
Article 14 also maintains that property should be used in such a way that it benefits everyone. A person who has many apartments, for instance, should rent them out. If he instead decides to keep them vacant, the state can intervene.