Superday - Received an invite for a second round interview

I just received an invite for a second round interview at Morgan Stanley for a summer analyst position. This email says this is one of their superdays. This will be my first time interviewing at something like this for BB.

What is the difference in superday interviews compared to first round? How many interviews should I expect? And any additional advice on better ways to prepare for this compared to a first round interview?

-Thanks

Trending Content - Job Search Advice Forum

+18	A few superdays but no offer, am I cooked?	1	1d
+16	I have hit rock bottom	4	1d
+12	Deferring a year to reapply	3	3d
+11	Recruit for FT IB or Focus on VC?	3	1d
+11	I genuinely hate coffee chats so much	3	1d
+10	Is moving to Houston worth it?	5	1d
+9	What are the right steps to turn this networking call into a summer internship	1	5d
+9	The trade lifecycle questions that actually decide middle office interviews, from someone who asked them for ten years	1	4d
+9	Capital One Business Manager Power Day	3	13h
+7	Should I Keep My Accepted 2027 SA Offer on My Resume While Recruiting?	3	22h