Asset Management vs Sales, Trading, Research

I'm struggling to understand that the difference is between the two business areas highlighted in the title.

For example, looking at the JP Morgan careers site, there are equity research roles within both these business areas...yet the description and training and development seem to be very different between the two. What's the difference?

Anyone shed light on this?

Trending Content - Equity Research Forum

+25	ER outlook	7	10h
+21	Started ER Internship, Reconsidering: Exit Opps?	13	2h
+15	Built a desktop valuation app (DCF / DDM / reverse DCF) so I'd stop rebuilding Excel models for every pitch — would value some ER feedback	3	2w
+14	How do you actually build your football fields — CapIQ, template, or from scratch?	7	1h
+10	Which masters after Equity Research	2	1w
+6	Trying to prepare for upcoming soph year	1	2w
+6	Networking During My Internship	1	2w
+6	Advice for a new associate?	2	2w
+3	ER o&g interview process	4	1w
0	Biotech // Therapeutics ER Comp	4	10h