Improving the speed of the Desktop and Mobile versions of the site can be more than just reducing the size of your images.
Here's an initial step you can take yourself to improve the speed of your site:
Use tinypng to reduce the size of your image files without compromising the quality of the image. See our 'How to' document here: Simple Steps to Improve Website Speed
If you require further assistance we offer a Speed Upgrade service via our HubDoWorks Partners Prodigitas.
The service includes:
1. Site backup
2. Testing Website Speed before optimization
3. Removing unnecessary plugins and themes
5. Enabling Gzip Compression
6. Optimize Databases
7. Optimizing Images
8. Website plugins up to date.
9. Delete old post revisions.
10. Delete spam comments if any.
New images and video added to the website will continue to affect the speed and wee recommend images are compressed in size prior to loading into the Media Library. Videos should be hosted on an external channel such as Youtube or Wistia etc and if possible an option to address the rendering of video and images on mobile should be addressed to limit continual rendering.