You don't. Protests happen all the time in the hundreds. How many have you heard of? I haven't heard of any unless it gets violent. Unions strikes are disruptive so you hear about them. Cost of living marches walking past government buildings or protesting outside of them? Nothing.
Want to know the last march I heard about that was large and non disruptive? It was on a Youtube video. The youtubers didn't even know it was happening.
Blocking a road is boring now so isn't being reported as much, disrupting a gaming tournament gets news.
Rallies help don't get me wrong but they are often ignored. The disruptive, novel protests get news coverage.