In this tutorial I will give a very basic introduction to X-ray Absorption Fine Structure (XAFS) Spectroscopy. I will start by the definition of the absorption coefficient and its measurement. Then I will describe the physical origin of the fine structure and illustrate its sensitivity to the local chemical and structural environment of the absorber atom. I will then show how the Extended X-ray Absorption Fine Structure (EXAFS) can be interpreted to extract quantitative structural information in the framework of the gaussian approximation (low disorder). Finally I will discuss typical applications, the complementarity with Diffraction Methods and the advantages of 3rd generation sources for XAFS Spectroscopy. I will end the tutorial by showing an example or two of recent experiments carried out at the ESRF.

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