Your client's campaign is getting a lot of clicks, but the conversion rate is low. which approach could improve your client's conversion rate?

The answer would be: Make sure the landing page is closely related to the ad

To have high conversion rate, the landing page should give an accurate advertising that closely related to it. Increasing the budget will increase the conversion number, but not the rate. Increasing the CPC bid or broaden the list of keyword won't increase the conversion rate either.