This article highlights common mistakes people make when applying gel nail overlays. It emphasizes the importance of proper preparation, including cleaning and buffing the natural nails before applying the gel. It also mentions the significance of using the correct gel formula and curing it properly with a UV or LED lamp. The article warns against overapplying the gel, which can lead to a thick and lumpy finish. Additionally, it advises against skipping the top coat, as it helps to seal and protect the gel overlay.