css how to change screen size so it fits in media query code example

Example 1: media query

@media only screen and (max-width: 600px) {
  body {
    background-color: lightblue;
  }
}

Example 2: media query in css

@media screen and (min-width: 374px){
   section#rent_sectionn {
    padding: 0 20px !important;
}
 }