Most website owners upload images with huge dimensions such as 2000px in width.
The bigger the dimensions of the image, the bigger the file size.
For example, an image with a 2000px width would have a file size of 1.5 MB at least.
And, the bigger the file size, the bigger the negative impact on the performance of the website.
So, to fix this problem, first, resize the image according to its display size as mentioned in the previous tip.
Next, compress the resized image using a tool like Tinypng.
If you notice in the above screenshot, Tinypng reduced the image sizes by 76%.