JPM Coverage vs. Product Groups?

I’m familiar with the workstreams of product groups like LevFin and M&A, but I’m curious about what the coverage group does at a bulge bracket like JPMorgan. I’ve got an interview coming up with them, and I want to sharpen my answers for why I’m interested in their coverage group. I’m particularly curious about the day-to-day tasks they do, is it mostly marketing materials, pitching, relationship management and whether there’s any modeling involved, or even updating models. I know FIG and REGAL often have in-house modeling, but I’m focused on a generalist coverage group—what else do they typically do on a daily basis?

I’m coming from a boutique firm with no banking experience, and while I’ve read online resources, they’re pretty vague or too broad. Looking for more specific insights on the JPM coverage side—any help would be great!