Click chemistry involving copper-catalyzed azide-alkyne cycloaddition (CuAAC) is one of the most useful and powerful methods to construct metallodendrimers. The design of such strategies includes the choice of the copper(I) catalyst source which is critical in the case of the click synthesis of dendrimers. The 1,2,3-triazolyl-containing dendrimers that are produced provide useful intradendritic ligands that are active in supramolecular recognition and catalysis. This account dedicated to K. Peter C. Vollhardt summarizes work conducted mainly in the authors' Bordeaux laboratory. 1 Introduction 2 Click Copper Catalyzed Azide-Alkyne Cycloaddition Metallodendrimer Constructions 3 The Copper-Catalyzed Azide-Alkyne Cycloaddition Reactions in Dendrimers: Mind the Copper(I) Catalyst 4 Redox Recognition with Triazolylferrocenyl- and Triazolylbiferrocenyl-Terminated Dendrimers 5 Click Catalysis with Extremely Efficient Intradendritic Triazolyl-Copper(I) Complexes 6 Click Dendrimers as Stabilizers for Very Efficient Nanoparticle Catalysis of Cross-Coupling Carbon-Carbon Bond Formation and Redox Reactions 7 Click Dendrons and Dendrimers for Efficient Catalysis Using Magnetically Recoverable Catalysts 8 Conclusion and Prospects2611 14371449