I will present our results from the MAGNUM survey, which exploits the unique capabilities of the optical/NIR integral field spectrograph MUSE at VLT to study in detail the properties of outflows in nearby Seyferts and their impact on the ISM and star formation in the host (feedback mechanism). MUSE allowed us to map the ionized gas down to ~10 pc in several emission lines revealing ubiquitous kpc-scale outflows, whose properties (e.g. velocity, density, mass rate etc…) were spatially dissected. By matching MUSE with radio data, we detected an intriguing (and possibly common) phenomenon, likely produced by the impact of low-power jets on their host galaxy disks. Finally, we found also evidence of outflow-induced star formation. I will also present preliminary results from a survey of mergers and dual AGN with MUSE Wide- + Narrow-Field, aimed at characterizing outflow acceleration along the whole merger sequence at all spatial scales and the role of mergers in triggering AGN activity.