A slug in WordPress is the unique URL-friendly name of a post, page, category or tag. It is a part of the permalink structure of the website. When a new post or page is created, WordPress generates a slug based on the title of the post or page.
It’s a URL-friendly name given to a post or page so that it can be easily identified and accessed by search engines and users.
The slug helps to create a clean and readable URL structure, making it easier for both users and search engines to understand the content of the page. The slug is also used to generate links to the page or post within the website.
Slugs can be edited for a post or page while creating or editing it, and it should be unique for every post or page to avoid any conflict with other content on the website. However, changing the slug of a post or page after it has been published can affect the URL structure of the website and may result in broken links, so it should be done with caution.
It is important to note that the slug should be short, descriptive and relevant to the content of the page or post. A good slug can improve the search engine optimization (SEO) of the website by making it easier for search engines to understand the content of the page.