What is this 80/20 rule ? when i google it the answer that I get is
"80% of income in Italy was received by 20% of the Italian population"
err I think maybe it's not like that in AM business ?
80% of your revenue / profit / success comes from 20% of your tasks.
Focus on the high leverage tasks (reverse engineering, ad-intelligence, testing & optimization, innovation, scaling, industry relationships) that have a big impact on your revenue / profit.
80% of your revenue / profit / success comes from 20% of your campaign.
Don't wast time with a $30/day campaign when you have a campaign that has the potential for x,xxx/days.
-> Analyze what are the needle movers in your business and then focus on it. Ignore or outsource everything else.
@Sebastian_r
Thx man Now I get it 
Is there any thread for reverse engineering in pop or mobile campaign ?
https://stmforum.com/forum/showthrea...ght=smart+cuts
It's the Pareto principle, and can be applied to most stuff https://en.m.wikipedia.org/wiki/Pareto_principle
You can find a book by Richard Koch for in-depth understanding, he talked extensively about it.
You can get it from Amazon here and read the preview https://www.amazon.com/80-20-Princip.../dp/0385491743
Cheers