How to make your blogs fast ?

Try below listed 5 steps to speed up your blog network

1. Compress and Resize Images with plugin like WP Smush, Compress or Imsanity.
2. Optimizing Script Files with Plugin like ljQuery CDN which will use an external CDN to increase the script’s loading.
3. Change Theme which loads faster .
4. Do Caching.by installing the plugin Varnish HTTP Purge which with purge cache makes everyone sees the changes applied to blog 
5.  you can blog crawlers by using plugins like Spider Blocker plugin, LinkPrivacy and in advanced cased using .htaccess editing.