The call aims to further improve the already considerable success rate of Hungarian researchers affiliated to Hungarian research institutions in ERC funding programmes, thus increasing the number of ERC funded projects in Hungary and the international reputation of Hungarian researchers and research institutions. The call enables researchers having a legal relationship with a Hungarian research centre to do research and exchange information while spending three to four months in a research group whose principal investigator has already won StG, CoG or AdG funding. This allows researchers to gain hands-on experience in how to prepare a successful ERC project proposal and how to lead an ERC funded research group, increasing their chance to successfully apply for ERC funding when returning home.