I am a beginner in Data Science field, so sorry if my question is too basic. 

The task is to build an **ad bidding model for online marketing** which allows you to deliver targeted ads to the right people.
A part of the given data is 
[![Part of given dataset][1]][1]


  [1]: https://i.sstatic.net/4qAcL.png

I don't have any additional info about the task. Is my target variable the variable **spent** ?
And if yes which is the best method to follow to predict the target variable?