The conference (1 day, November 27) gives you the full slate of keynotes, ISSCA's international faculty, the MedConnect networking evening and an official certificate of participation.
A certification (2 days: the November 27 conference + one certification day) includes that entire conference day as Day 1, and adds a hands-on certification day plus the official ISSCA certification. There are two: Advanced Peptide Therapy on Saturday, November 28 (Day 2), and Cellular Therapies & Regenerative Medicine on Sunday, November 29 (Day 3 — held at a clinic, limited spots).
The ISSCA certification is issued exclusively to licensed physicians (MD). The conference and the hands-on sessions are open to all healthcare professionals, but the credential itself is physician-only.