Ivonne I just resized and compressed that image and the one for the mobile version. It was really big, 1980px width which was unnecessary because the maximum width of the main content is 1350px.
There are some plugins for image compression but a better option is to always resize and compress images before uploading. There's a great option in Adobe Photoshop I use to save images for our websites: "Save for Web (Legacy)". Also, images shouldn't have more than 1920px.

Selena  thank you so much!

Selena I used to use that adobe photoshop feature when using photoshop. However, if downloading from canva, for example, does the photo below need to be resized and compressed further?

Treatment area pages.jpg 118 KB • Download

Ivonne I think this is already fine, but can be compressed even more with free online tools such as: 
https://imagecompressor.com/ 
https://compressjpeg.com/
https://tinypng.com/