Q. I always wondered why we say or learn Pirkei Avot then?
A. We recite Pirkei Avot (Ethics of the Fathers) after Pesach as spiritual preparation for Shavuot. Just as the Jewish people refined their character traits after leaving Egypt to become worthy of receiving the Torah, we study these ethical teachings during the Counting of the Omer to improve our own moral integrity and humility.
The tradition spans the seven weeks between Pesach and Shavuot, and provides a dedicated time to focus on personal growth and values. Many people who study or just say Pirkei Avot on Shabbat afternoons do so following Mincha, while others study before Mincha. See next question
Rabbi A. Bartfeld as revised by Horav Y. Hirshman, Horav Dovid Pam, Horav Aharon Miller and Horav Chanoch Ehrentreu, Horav Kalman Ochs, and Horav Dovid Bartfeld consulting in need Horav Hagaon Rav Yitzchak Berkowitz Shlit’a