Joomla template displays pages in a specific format. It divides the pages into a number of modules like nav, header, footer, top, bottom, module, etc. This is known as position.
In Joomla, a “position” refers to a specific location within a template where modules can be assigned to display content. These positions are predefined areas within the template layout, such as header, footer, sidebar, or main content area.
When you create or modify a Joomla template, you define various module positions where Joomla modules (such as menus, login forms, or custom content) can be assigned. By assigning modules to different positions, you can control the layout and appearance of your Joomla website.
In essence, positions in Joomla provide a flexible way to organize and display content within the template structure, allowing for customization and control over the layout of your website.