After fitting a model with at least one mediator variable, the question arises whether the mediator variable's role is significant?
To answer this question, you need to do mediation tests. SEM-PLS software performs mediation tests for you.
Mediation Tests: https://statisme.com/Learn/IntroductiontoSEMPLS ; E.4.1.1. & E.4.1.2.
Mediation Test By SEM-PLS 2022: https://statisme.com/Learn/PathAnalysis ; D9.
For example, you are researching the GDP index. GDP latent variable is made from three measurement variables "GDP Nominal," "GDP Real," and "GDP per capita." In this regard, GDP_1 and GDP_2 will be the latent variable of GDP with a lag of one year and two years, respectively. A model with the mediating role of GDP_1 can be considered. If the P-value of the test is less than 0.05, the mediating role of GDP_1 variable is accepted with a confidence level of 95%.