Heat is often used in cardmaking for a variety of purposes, such as embossing, drying ink, or setting adhesive. Heat embossing involves stamping a design with embossing ink, adding embossing powder, and then using a heat tool to melt the powder, creating a raised and shiny effect. Drying ink with a heat tool can help prevent smudging while working on a project. And using a heat tool to set adhesive can speed up the drying process and ensure a strong bond. Overall, heat can be a helpful tool in creating beautiful and professional-looking cards.