The site is rebuilt using CSS media queries, which apply different rules to the page depending on the size of the device in this case, the browser window viewing the site. The HTML remains the same, it is simply rebuilt using CSS.
CSS rules can be used to change the layout of everything on your site, including displaying images of different sizes depending on the device resolution. This is very useful when you want to do something like ensure that retina-enhanced images are displayed specifically on iOS devices.
The choice between an app and a responsive website comes down to the purpose of the site.
Most websites will benefit from a responsive design bahamas telegram data that can adapt to devices. A mobile app comes into play when users need very specific functionality on a mobile device that is different from what a full-fledged website provides.
Responsive design on different screens
Your bank likely offers a mobile app so you can quickly and securely check your balance from anywhere. Facebook and Twitter also tailor their app functionality to suit mobile needs.
A native app is only worth considering if your users need a specific set of features that are different from what they need on your main site.
Responsive Website Performance
Responsive design will impact the overall performance of your site. Loading a lot of CSS and images of different sizes to respond to device sizes can be expensive in terms of back-end processing.