PPC – Pay Per Click campaigns are very competitive. Search Engine Marketing agencies are under pressure to deliver positive results.The performance of PPC campaigns is dependent on many factors: The impression rate -
 Ad position 
- Click thru rate (CTR) 
- Conversion rate.
Finding the right balance between impression rate, ad position and clicks through is the starting point to successful PPC advertising. The frequency is expressed by number of impressions. If your daily budget is not high enough, your ad may not show each time. This impacts your campaign as you may not have enough impressions being shown per day. Your Ad position depends on the Rank Number. The higher the rank number, the higher the ad position on the page.