The multiple spacecraft currently in operation at different locations around the inner heliosphere can set constraints to the morphology and topology of various solar and heliospheric structures, such as coronal holes, active regions, prominence eruptions, streamers, EUV waves, CIRs and CMEs to name a few. This session focuses on what can be learnt about their behavior when multiple vantage points are exploited and how models can therefore be improved, in particular for geo-effective events.