Websites these days are supposed to be made responsive as there are more than one tech-devices available and the look of the website changes from device to device. It may also appear different, when used via different browsers. And, therefore, it is extremely important to make websites responsive, so that it works just fine as and when used on different browsers and/or devices.
Fixed websites have a set width, and resizing the browser or viewing it on different devices won’t affect on the way a website looks. This will then have horizontal scrolling and a website with this scrolling might not look good on tablets or smart-phones. Fluid websites are built with widths that are defined in percentages. Due, to this, the columns are relative to one another and the browser allows the website to scale up and down fluidly.
Adaptive websites come up with media queries that target specific device sizes such as monitors, tablets, mobiles, etc. Responsive websites consist of the good points from all these types of websites. Built your responsive website, on a fluid grid and use media queries to control the design and its contents that can be scaled up or down with the change of a browser or device.