The 33rd Summer School and International Symposium on the Physics of Ionized Gases (SPIG 2026) is a biennial international conference with a tradition spanning more than 60 years. It covers a wide range of topics in the physics of ionized gases, including atomic collisions, laser–matter interactions, low‑temperature plasmas, and general plasma physics. Each edition features a Summer School that supports young researchers by providing a platform to present their work—especially Ph.D. results—to leading experts in the field. This creates an exceptional environment for scientific exchange and collaboration. Although the SPIG conferences are traditionally organized by one of the major laboratories in Serbia, the event has a distinctly international character, featuring an international scientific committee and numerous invited speakers from around the globe. Over the years, many of the most prominent scientists in SPIG‑related fields have taken part in the conference.