Arrays are a prominent ClickHouse SQL extension that can accelerate query speed up to 100x in well-chosen use cases. This webinar introduces ClickHouse arrays and shows how to use them effectively. We provide examples of idiomatic usage including aggregate functions, lambda expressions, and array join.  The webinar also guides you on use cases where you should immediately reach for arrays as well as those for which they are not helpful. Please join us to become a power user of this popular ClickHouse feature.