Several variables go into the determination of your advertising costs on Google. As a result, there isn’t a simple and one-size-fits-all approach to answer this question. However, these are some reasons why there isn’t a clear-cut approach to determine advertising costs.
 They depend on the industry
 The customer lifecycle is not a fixed variable
 Trends are constantly changing
If your ad is well-written, relevant, and becomes a success, your ad campaigns can become more cost-effective.