The heart of this Wordpress plugin - 'Popularis Extra' lies in its distinctive ability to enhance WordPress website functionality without demanding any programming input from the user. In simple terms, this plugin adds particular features to your WordPress theme that help in creating an impressive and efficient website.

At the core, 'Popularis Extra' is designed to streamline and simplify the web development process on WordPress. Consequently, it offers an assortment of features that increase the website's utility and aesthetic appeal. Among the main features, the plugin provides extra widgets and additions to the WordPress customizer. These maintenance and under-construction pages fortify under-development websites from unnecessary exposure and intrusion.

'Popularis Extra' additionally offers a top bar. The essence of the top bar is to provide extra space where crucial information like contacts, social links, and any additional information can be placed for easy and fast navigation by the website visitors. The plugin also enables a sticky or fixed menu. This feature elevates the user experience by ensuring the navigation bar is always visible, regardless of the site visitor’s position on the webpage.

Most importantly, 'Popularis Extra' pays particular attention to the website’s typographic aesthetic. It does this by providing Google fonts which the website owner can use according to their preference. With this feature, customization of font styling is just a few clicks away, ensuring that the style is consistent with the branding of the website or company.

Moreover, it also empowers the user to toggle page titles, providing flexibility in terms of the design of individual page layouts. The plugin further provides the ability to add shortcodes into widgets, providing a higher degree of flexibility and customizability over the site's design and layout. This concise description of ‘Popularis Extra’ barely scratches the surface of what the plugin is capable of. However, even from this brief overview, it's apparent that the plugin is a handy tool that transforms the web development process on WordPress.