Five-dimensional superconformal field theories (5d SCFTs) play an interesting role in the general understanding of quantum field theory. They often provide strongly-coupled UV fixed points with remarkable features for perturbatively non-renormalizable gauge theories, which makes them interesting in their own right. Moreover, prominent lower-dimensional theories can be obtained by compactification from five-dimensional parent theories, and this perspective has led to numerous new insights. A fruitful interplay between string theory and quantum field theory methods has led to a coherent and thorough understanding of 5d SCFTs, and I will review recent developments in this context.