1. The dollar signs $...$ are used in math to indicate inline LaTeX math mode. 2. This means anything between $ and $ is interpreted as a mathematical expression. 3. For example, $x+1=2$ shows the equation clearly in math format. 4. Using dollar signs helps separate math from normal text for clarity. 5. In display math mode, double dollar signs $$...$$ are used to center and highlight equations. 6. This is a standard convention in math typesetting and markdown environments.