18%
Odsetek Europejczyków posiadających prywatny produkt emerytalny (według EIOPA)
BCG2025Europe
Comparing two versions of an element — such as a headline, price, or layout — on randomly split traffic to choose the more effective one.
Why it matters
Turns debates about taste into decisions based on numbers.
What's missing without it
Without testing, changes are made by gut feeling, and it's unclear whether they helped or hurt.
When it is used
When optimizing websites, ads, emails, and pricing.
How we use it
Half the traffic to version A, half to B, measuring revenue per session.
Fun fact
The most common mistake is stopping a test when the result looks favorable. With small sample sizes, differences of several percentage points can appear and disappear randomly.
Numbers worth knowing
Market research in data
3
Prognoza stosunku pracujących do emerytów w Europie do 2045
BCG2045Europe
31%
Odsetek konsumentów korzystających z AI na pewnym etapie ścieżki zakupowej, około 3-krotnie więcej niż 18 miesięcy temu.
Boston Consulting Group (BCG)2026global
Figures from the same field — collected in our market data base.