Varnish boosts the performance of a website and decreases the load time to a great extent. While using it with Drupal, all the HTML which is generated after complex Drupal computations is stored and served by Varnish instead of a web server. Read the original post on Open sense Labs.
I have hosted various Drupal 8 websites on AWS. Hosting on AWS isn’t very different from any other VPS, but using the best services of AWS such as EC2, RDS and S3 to boost Drupal 8 performance is worth exploring. Check out the original post on Open sense Labs Image Credits : Drupal Association and AWS