💡 Defining viewport in Meta tag.
💡 Using CSS Relative measuring units. (em, rem, vh, vw, %)
💡 Responsive / fluid image or image responsive.
💡 Defining Body’s max-width and margin: 0 auto;
💡 Responsive split screen using flex. ( Using media quires for 2 columns section.)
💡 Grid Responsive (multi column).
💡 Responsive Menu bar (using Js or CSS Frame work).