I have a group with three different treatments. One group gets shown 0 Tags, 4 and 7. N's are different in the range of 80-100 and data does not follow a normal distribution.
I would also like to compare 0 to 4, 0 to 7 and 4 to 7
How can I evaluate my data for statistical significance?
Your problem has the structure of a one-way anova with three groups. Since the distributions are not normal, you can use some robust or non-parametric approach. See for instance non-parametric alternatives to anova and Can I trust ANOVA results for a non-normally distributed DV?.
But you seem to be interested in post-hoc analysis, so see Kruskal-Wallis and post-hoc analysis in R