The Tropospheric Ozone Assessment Report (TOAR) is an initiative of the International Global Atmospheric Chemistry (IGAC) project. TOAR-II is the second phase of TOAR. It builds on the successful completion of the first comprehensive assessment on tropospheric ozone and will last from 2020 to 2024. The TOAR-II Data User Workshop 2023 is an extension of the workshop already held in 2022 (http://doi.org/10.34730/f52a5d792fbb42c3b1f1b92333d4d86e) and showed the innovations in development since the previous year. In particular, the newly developed dashboard was presented, and the tools for accessing and analysing data from the TOAR database were explained. This publication contains all lectures that were held during this event. Furthermore, users' workflows and data analysis problems have been tackled in hands-on sessions. The feedback from this workshop will also influence the further development of the TOAR infrastructure. All workshop material including the hands-on codes can be found at https://gitlab.jsc.fz-juelich.de/esde/toar-public/toar-data-user-workshop-2023.