Optimize Your Photos
Reduce image size without reducing quality
There are so many ways to retrieve photos from a variety of sources these days, and it's important that every image get the proper treatment that prepares them for being showcased on a website. That includes making them as small as possible with tools like Photoshop ('Save for Web') or online compression/optimization generators.
Ideally, your images should be no larger than 1MB
Reducing the resolution is one way to drastically decrease file size
Crop or resize images to maximize their impact