The LHCb and Belle II experiments explore phenomena in quark-flavour physics
at unprecedented precision and extend studies to ever rarer decays to test
the Standard Model (SM) of particle physics and search for nonstandard signals.
Since some years now, tensions with the SM have been observed, also known as
"B-physics anomalies". We will give an introduction to the field and discuss
the status, what has been learned so far and what we would like to know in