Image Rename & Resize

Do I need this when I have less than 50 images?

Yes, here is why. WordPress creates 4-6 resizes by default for every image you upload to your site. Your theme, or other plugins you have installed, may add additional sizes to be created for each upload. So while you might look at the Media Library and think you only have 100 images, it is likely that you have at least 500. As a rough estimate, you can simply multiply the number of resizes by the number of images listed in the Media Library. 

What is the benefits of this service?

✓ Image renaming to improve Google Search Photos visibility.
✓ Image resize for page alignment.
✓ Prevent a backlog of unorganized files from building up, which could cause data to be lost or deleted.
✓ Fix filename with special characters ($, *, &, # …) or accent letters (ñ, á, é …).
✓ Solution for issues: unable to upload image in WordPress.