A sticky header is a menu or navigation bar that stays at the top of the page no matter where you scroll. In other words, a “fixed” header. It will allow quick access to the menu from any part of the page.
It is a premium feature available with Suki Pro. You can activate the module from Appearance > Suki > Sticky Header
You can find the settings under Appearance > Customize > Header > Sticky Header.
Enabling sticky header only on specific pages
Enable/disable sticky header from Appearance > Customize > Header > Sticky Header will enable/disable the sticky header globally on all your website pages. If you want to enable/disable sticky header on specific pages, you can use Dynamic Page Settings module.