Step 1: Login to the Wordpress admin dashboard.
Step 2: Go to "Plugins" menu and click 'Add New' option.
Step 3: Install and activate EWWW Image Optimizer plugin.
Step 4: Once the plugin is installed and activated, you need to go to Media > Bulk Optimize to optimize your images.
Step 5: You will have an option to bulk optimize all images in Media library using Start Optimizing option. Here you can also optimize all other images outside Media library such as graphical elements of the theme and so on with Scan and optimize option.
