The novel / creative thing that OWS did for its time was to lasso the local activists in cities all over the country into a plan to just sit in a park in the middle of the city and build little protest camps with signs everywhere. Because why not? It gets attention. And then people are like "oh a protest, so what's it about? You don't like Wall Street and the 1%? Huh. So when is it over? Uhh, it's not?" And then it just... sits there... for weeks.
If you think about it on the basic level like that, it's just funny. The media also got really angry about it. The corporate / mainstream liberal media haaaaaated Occupy Wall Street and did everything they could to be like "bluhhhh they don't have any demands blaahhhh." You're making Obama look like a goddamned fool! If those guys are mad and whining, then you're doing something right. But you know, it had to end eventually. I think the brief success of that tactic was also its undoing because the cops could sit back, then infiltrate, disrupt, etc. And then once most people went home, they moved in with force in every city that still had them and cleared them out.
I think the adaptation to that was first seen in North America in Montreal in 2012 (over student tuition hikes). The activists would not stay in one place but meet at a park and then do wildcat marches all over town. Just cause random disruption with zig-zaggy marching routes to keep the cops on their toes. And then build momentum with that and a bunch of other tactics, leading to mass demonstrations w/ union support that would just swamp the financial / downtown district. I think they won, actually, and contributed to bringing down the right-liberal provincial government.
BLM in 2020 seems like it was influenced by it, even if by sheer accident. BLM uprisings and protests have been going on since 2013 or so, but they were mostly small and relatively isolated, like Ferguson. But then it merged in 2020 with the white left and just took off and would also suck in liberal fairweather supporters so you could have real mass demonstrations that can be a force in downtown areas. But also not staying put in one place. You just go out every night and march all over the city.
Of course the state gets its act together and they come up ways to counter it. And then you learn from that and think about the next thing.