Do you need to use Bootstrap? You don’t need to use it, but if you want to make your development time shorter it is highly recommended to use Bootstrap’s tool box. It will help you to speed the most common design problems, for instance such issues like responsiveness or fonts or general layout for objects on page can be quickly solved.
As we know in design there are some layout patterns, repetitive tasks and layout pieces which we have to undertake/design for almost every website – lets say header area, footer area, content area, some sidebars on left or right side, tables which should be redesigned on the fly depending on browsing device etc.
Bootstrap was developed by Mark Otto and Jacob Thornton at Twitter.