Pay Per Click Management, Sponsored Links, Ad Links, Banners
This is a direct marketing strategy that only costs money when someone clicks on it. Because you only pay per click, this allows you to set a budget and guarantee a certain number of warm leads that only find you while searching for specific key terms and get marketing research.
Using marketing analytics, pay per click will give you great research. Finding out what your clients are actually typing to search for gives you the advantage to maximize those key terms.