Defensive Example Rule-Set - Manual Adgroups
Low ACOS: if ACOS < 20% after 35 Clicks --> increase bid by 30%
High ACOS: if Acos > 20% after 25 clicks --> decrause bid by 30%
Low Impress: if impressions < 500 after 7 days --> increase bid by 30%
0 Sales: If 0 sales after 40 clicks --> pause / negative Keyword
The selected ASOS should consider your Target ACOS though.
In this article (click here) we explain how to determine the Target ACOS.
If 0 sales after 25 clicks --> negative searchterm
How many clicks one should wait generally depends on the product's usual conversion rate. This is explained in more detail in this article (click here).