YouTube Explainer URL: https://www.youtube.com/watch?v=KJygs-IfsTk&t=9s
This video explains how to conduct Confirmatory Tetrad Analysis in SmartPLS (CTA-PLS) to determine whether your PLS model is Reflective or Formative.
Reference: Gudergan, S. P., Ringle, C. M., Wende, S., and Will, A. (2008). Confirmatory Tetrad Analysis in PLS Path Modeling, Journal of Business Research, 61(12): 1238-1249.