The fundamental challenge of microfinance is to continuously increase its outreach to poor people through sustainable financial institutions. However, ensuring that poor people, especially the very poor, do receive access to financial services, is often difficult. Many MFIs have therefore resorted to "targeting" to ensure that the poor and the very poor are actually served. The Client Targeting Center has been designed by CGAP to provide information on the targeting tools that MFIs use. It also documents their experiences and provides an assessment of their successes.