Site speed is a ranking signal for google. Ensuring your website is fast and efficient can give you a boost in your SEO results.

We also discuss:

• How optimizing your site can improve your bounce rate
• Contributing factors to a slow website\
• What you can do to improve your site without touching code
• Limit the number of tracking scripts
• lazy loading images / maps
• Web hosting - shared vs VPS
• Caching & Minifying
• Image Optimization / Responsive Images

Google image srcset peas to find the article by Eric Portis that Andrew Mentions.