Today, bibliometrics is a standard instrument in research evaluation besides peer review. The instrument is used for assessing single researchers, research groups, institutions, countries etc. The presentation will focus on several aspects of the use of bibliometrics in research evaluation. After some basic information on bibliometrics in the first part (e.g., the difference between citizen and professional bibliometrics), the presentation will explain in more detail one of the most important type of indicators: field-normalized citation impact indicators. In the second part of the presentation, it will be shown how field-normalized citation impact indicators can be used to assess research of single researchers, institutions, and countries. In the final part, two web-based tools will be presented that can be used to assess (1) the distribution of institutional performance worldwide (see www.excellencemapping.net) and (2) the success of institutional collaboration activities worldwide (see www.excellence-networks.net).