If I already have a campaign running with neg keywords, etc, and I click add a new AdGroup so that this ad will have the same neg keywords, etc BUT has different keywords that I am bidding on along with different title, etc. Is the traffic split between these 2 campaigns because I put them under the same category? I hope I explained that clear enough
Well, the traffic is not really splitted up. But your daily budget is related to your campaign. So if you have a budget of 5$ and Ad Group 1 uses 4$, it remains only 1$ for your Ad Group 2. This is IMHO the only restriction.