logo.png file in the assets/images folder. You may notice that its dimensions are large, 900 px wide. In our final design, it will be only 120 px wide. Because the pixels will be compressed into a smaller space, this is a relatively easy way to ensure that the image will look good on all devices, including retina displays. Meanwhile, the file size of the image, which has already been optimized for the Web, is only 19 KB.
So, let's put it in place and constrain its width:
html/includes/header.htmlfile in your text editor.
<a class="navbar-brand" href="index.html">Bootstrappin'</a>