Embedded OpenType (EOT) is a font format developed by Microsoft that allows fonts to be embedded within web pages. This enables web designers to use custom fonts without requiring users to have those fonts installed on their devices. EOT files are typically smaller than standard font files, making them more efficient for web use. EOT is primarily used in conjunction with CSS to style text on websites. When a browser encounters an EOT font, it downloads the font file and renders the text accordingly. This helps maintain consistent typography across different platforms and devices, enhancing the overall user experience.