This is the 7381st most frequent Catalan word.
arreu
Everywhere.
In this case, 'arreu' conveys the meaning of 'wherever', indicating any place visited.
Arreu on vaig, sempre em sento benvingut.
Wherever I go, I always feel welcomed.
Here, 'arreu' is used to mean 'all over', providing the sense of being in many or all places globally.
Arreu del món, les cultures celebren festivals únics.
All over the world, cultures celebrate unique festivals.
In this sentence, 'arreu' refers to 'all around', giving the idea of traveling extensively within a region.