A WordPress theme is a collection of files that determine the layout, design, and overall appearance of a WordPress website. It includes templates, stylesheets, and other assets to control how your website looks.

A WordPress plugin is a piece of software that can be added to your WordPress site to extend its functionality. Plugins are used to add features, enhance performance, or integrate with third-party services.

No, they serve different purposes. Themes control the website’s appearance, while plugins add specific functions or features. You can change your theme without affecting your plugins, and vice versa.

To install a theme, go to your WordPress dashboard, navigate to “Appearance,” and select “Themes.” Then click “Add New” and either upload a theme or choose one from the WordPress theme repository.

To install a plugin, go to your WordPress dashboard, click on “Plugins,” and then select “Add New.” From there, you can search for a plugin, upload one, or install it directly from the WordPress plugin repository.

To maintain security, regularly update your plugins to the latest versions. Additionally, only install plugins from reputable sources, and remove any unused or outdated ones.

You can only activate one theme at a time on your WordPress site. However, you can use multiple plugins to add various functionalities to your site simultaneously.