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The study of strong electron correlations in transition metal oxides (TMOs) unveiled a complex world of interweaving properties, concerning their electron spin, charge, and crystal structure.Predominant examples are high temperature superconducting cuprates and hole doped manganites.Competition among different interactions in these systems generates spectacular phenomena, such as the formation of charge and spin stripes, mesoscopic phase separation, and the colossal magnetoresistance (CMR) effect.Despite the intensive research in this field there are still a lot of important open questions.In this lecture we will show how NMR can be used in order to acquire important information about the local structural and magnetic environment and its dynamics in characteristic TMO systems [1-3].