Type C visas allow you to travel within the Schengen Area for a maximum of 90 days (3 months) and may be issued as either tourist, business or family visit. They also offer educational programs that last less than three months but more likely between 1-2 quarters; internship opportunities which usually last 4 weeks at most – not longer then 6mos., although some internships can go on indefinitely if they're unpaid positions with no expectation regarding future work volumes etc.; short employment engagements where an employee is given light duties like volunteering without any pay involved whatsoever other then what's donated towards living costs during the traveling.
The Schengen visa is a long stay type D, which allows travelers to remain in Europe indefinitely. This makes it perfect for those who plan on staying for 4-12 months! The validity of these visas are the same as your authorized trip duration so you don't have worry about losing any time while traveling through member states with this card.