Kya Pata Hai Supreme Court ka Kya Role Hai?

Main abhi tak confuse hoon, koi bata sakta hai ki Supreme Court ka role hai kya. Maine padha hai ki woh high court ki decisions ko verify karta hai, lekin kya uske paas koi aur power bhi hai? Maine suna hai ki usne Article 21 ka interpretation kiya tha, aur iske liye woh landmark judgments kiya hai. Lekin kya agar SC ki baat na manne ki hai, to kya high court kya karegi? Ya phir koi aur court ka role hai? Koi bata sakta hai?