A quick tutorial I made for a blog post showing how to improve page load time by over 80%: (https://www.alistairgill.com/page-load-time). The video explains my 30 second process for optimising images or photos for SEO.
One of the most common issues I find during SEO audits for clients is slow page load times. This is often caused by poorly optimised images.
Here is my 4 step process:
Step 1 – Resize the Image
I see way too many images uploaded at full resolution. Ideally the image should be uploaded to the website at the same resolution it will be displayed. Obviously the smaller the resolution, the less pixels are in the image and so the smaller the file becomes. The smaller the file size, the quicker it will load from the server.
Resizing the image before uploading also helps because the image does not have to be resized by the browser during the page load.
Step 2 – Compress the Image Losslessly
I use ImageOptim to do this: https://imageoptim.com/mac
It’s as simple as dragging the file into the application window and waiting for it to compress the file.
It works by removing the metadata from the image such as camera settings and location data. Most of the time this isn’t required, but removing it makes the file smaller without affecting the quality of the image.
Step 3 – Rename the Image
I always try to rename the file so it has a relevant filename. So instead of image0001.jpg I would rename it to RelevantKeyword.jpg. If nothing else, this just makes it easier to know which images are which in your media library.
Step 4 – Specify Image Alt Text
When I upload the file in WordPress I enter a keyword relevant description in the Alt Text box. This is primarily for screen readers, so that anyone with a visual impairment can still understand what the image is about. In the same way, it helps the search engines understand what the image is.
That’s it! My simple, 30 second process for optimising images for SEO. Hope it helped.