I have a community site that will rely on speed being good so during my testing i am trying to check the site on GTmetrix as i go. I have W3 Total Cache installed and this has sped the site up no end but i still have an issue with the following results.....
Specify image dimensions - F (0) - 51% - Images - High
Remove query strings from static resources - F (8) - 91% - Content - High
Optimize images - F (21) - 73% - Images - High
Serve scaled images - F (43) - 90% - Images - High
Optimize the order of styles and scripts - C (70) - 94% - CSS/JS - High
Use efficient CSS selectors - F (0) - 20% - CSS - Low
Remove unused CSS - E (59.7) - 63% - CSS - Low
A lot of them appear to be image related and i am running EWWW Image Optimize.
Just need any advice on these high demand errors....