What is the .row container for in bootstrap?

Question

Adaptive design

Hello!
Please explain in more detail what .row is for? What with him, what without him - everything works fine

Answer 1

.row {
    margin-left: -15px;
    margin-right: -15px;
}

+ has clearfix
properties Analogue overflow: hidden;
This prevents internal .col- from falling apart

Answer 2

This row class lines up components in a row .
Elements must be inside a row
.row tag must be wrapped in .container (fixed-width) or .container-fluid (full-width) to properly align and pad.

Answer 3

most likely it has the property clear: both. That is, a kind of capsule so that their blocks do not swim out and strangers do not swim.