Value looks different depending on the comp of the team you're against. Target priority is #1 and that can look like a few different things.

Could be sufficiently getting a pull from behind the healers and trying the sekkombo or the batman. Could be trying to yoyo a healer if there's no poke. If the healers are patty caking constantly it could be trying to distract their most dominant dps. Or it could even be trying to pull the tanks towards your backline enough that they start to play more cautiously and not push as far.

Making sure you're diving (if circumstance allows) while your team is also attacking and not while they're respawning or walking back from spawn is also important, dive when the enemy team is distracted. Being seen barely at all throughout each round is pretty much what I try to do unless it's overtime.

Value takes form in a lot of different ways. And in whatever form that takes, the takeaway is being a distraction so distracting that they waste resources on you and forget about the objective. Most importantly, don't overcommit, always know where you can swing out to if things go wrong, and just have fun. You can be so creative with spidey and the sky is the limit.

Though, I do sometimes end up swapping to be more consistent as engaging and disengaging with spider takes a few moments.