The average cost of google ads depends on many factors like the difficulty of keyword, intent of keyword whether it is buying or informative. Buying keywords have more CPC( cost per click ) than informative content. It also depends on which location you have chosen, what is the competitive level of the keyword, How your ad performs in the google ad auction .so many factors are responsible for the average cost of an ad . if you have made good ads then you are going to have a low CPC.

The cost of Google ads based on a number of factors, which includes the competitiveness of our keywords and industry, our geographic location, the quality of our advertising campaigns and many more.

In the US, the average cost per click for Google search ads for all industries is $2.32. In other countries, average costs for Google ads are often much lower than US.