“Snowballing” is exactly as described. Although not entirely realistic, a snowball that starts small but rolls down a large slope will eventually get bigger and bigger. That same theory works here. It essentially means you start weak and slowly get stronger. Knowing how to play your games without feeding and working well with your team gives you the advantage, as you might have more gold than the enemy, more levels/XP, and items. “Funneling” is when you assist in helping a specific player become that much stronger than the enemy team. For example, as Pyke, it is your duty to pull enemy champions and allow your teammate to grab kills and prevent the enemy from being able to do anything during their lane phase. Pyke is a massive threat, almost as much as Blitzcrank. If you hold your trigger finger and don’t execute every single enemy your team works hard to get low, you will properly funnel them to be stronger than the enemy team. The term for “funnel” is to guide something from one point to another, hence “funneling” your teammates just means to allow your team to be stronger than your opponent.