Sac State is a California State University (CSU) campus, and while generally considered less selective than UC schools, it's not necessarily "easy" to get into. Its acceptance rate fluctuates, but it's typically higher than the University of California schools but lower than many community colleges. A higher GPA and SAT/ACT scores will significantly improve your chances. Highly competitive programs within Sac State may also have stricter admission requirements.
In short, while not as challenging as getting into a highly selective university, it requires a solid academic record and a competitive application to ensure admission. You should check Sac State's official website for the most up-to-date admission requirements and statistics.