What is responsive website?

If we accept the idea for a campaign of a commercial company that markets ice cream for the summer, then in newspapers, billboards, on television, the medium is different, but the ice cream and the messages must be the same.

And what about the site we built, will the surfer be able to enjoy the same browsing experience on a desktop computer, tablet, smartphone?The answer is: building and designing a website in the right responsive manner will allow the surfer to enjoy the browsing experience in everyone. That is, the structure of the website and the content should suit every device.
Does the intention in adapting the site (responsiveness), both for a computer with a large screen and for a smartphone, mean that we will take the site as it is on the big screen, “take some air out of it” and shrink it four times? Definately not!

There are several choices facing the site programmer:

Perhaps this is the moment to emphasize that the mobile device is not the one that makes the site appear correctly and optimized this is the role of the site programmer.

There are several choices facing the site programmer:
Will all the content that appears on the full site also appear on a smaller device?
There are features like Flash-based animation that is not supported on some of the mobiles. An important point then in building the design for the site. If we want animations we will have to base them on other technologies.
Apart from the need for planning during the site characterization phase, in order to make the site responsive, the web programmer will help with CSS HTML and JAVASCRIPT, which are the backbone of most responsive designs.