You can customize your site logo by going to Customize > Navigations in Semplice, and editing your navigation bar. If you have not created a navigation bar yet, you will need to create one and set a custom site logo.
Setting your custom logo
You can use a text logo or upload your own logo. If you upload your own logo, use a PNG or SVG vector file format. SVG format will be the best quality.
For more tips and tricks regarding your logo, please read our guide on customizing the navigation bar.