You can expect the similar question in any of the industry you opt to go for the job. By asking this question interviewer wants to know why do you want to work in Pay Per Click and Advertising industry. Just make them clear about the desire to work and your passion in PPC. Also, you can say the challenging features of PPC industry and you wish to work with those challenges. Let them know you are not interested to work for a simple job, but prefer a job that challenges you daily. If you have any previous experience working in PPC industry, you can quote one.

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