  Modeling customer shopping intentions is a crucial task for e-commerce, as it
directly impacts user experience and engagement. Thus, accurately understanding
customer preferences is essential for providing personalized recommendations.
Session-based recommendation, which utilizes customer session data to predict
their next interaction, has become increasingly popular. However, existing
session datasets have limitations in terms of item attributes, user diversity,
and dataset scale. As a result, they cannot comprehensively capture the
spectrum of user behaviors and preferences. To bridge this gap, we present the
Amazon Multilingual Multi-locale Shopping Session Dataset, namely Amazon-M2. It
is the first multilingual dataset consisting of millions of user sessions from
six different locales, where the major languages of products are English,
German, Japanese, French, Italian, and Spanish. Remarkably, the dataset can
help us enhance personalization and understanding of user preferences, which
can benefit various existing tasks as well as enable new tasks. To test the
potential of the dataset, we introduce three tasks in this work: (1)
next-product recommendation, (2) next-product recommendation with domain
shifts, and (3) next-product title generation. With the above tasks, we
benchmark a range of algorithms on our proposed dataset, drawing new insights
for further research and practice. In addition, based on the proposed dataset
and tasks, we hosted a competition in the KDD CUP 2023 and have attracted
thousands of users and submissions. The winning solutions and the associated
workshop can be accessed at our website https://kddcup23.github.io/.
