For a broader explanation of controlling detail around one elaborate focal piece, see this guide to ornate necklaces in Gamine outfits. The difference here is practical: this necklace contains both a graphic chain and multiple charms, so your main choice is whether a quiet second line improves their spacing.
Before buying, compare the product image with the necklines and accessories you actually wear. Look specifically at the selected beach-shell variant, because other charm combinations change the visual count. If most of your tops already have busy collars or prints, plan to wear it solo. If you own several plain open-neck tops and simple chains, the layering option has more room to be useful.
The final rule is straightforward: start solo, then add only what makes the necklace easier to read. For a Gamine outfit, the mixed charms can supply animation while the paperclip links supply structure. A second chain earns its place by clarifying those elements, not by making the jewelry stack larger.