Covering 26 countries, the Schengen Visa allows you to freely circulate within the Schengen area without any border controls. It allows you to stay in the territory of the Schengen States for no more than 90 days for tourism or business.
The Schengen area is an EU passport-free zone covering most of the European countries. Apart from the Schengen Tourist Visa, you are required to apply for a national visa of that particular country if you are planning to live, work, or study in any one of the Schengen countries for more than 90 days.