A `sitemap.xml` file is an XML file that provides search engines with information about the pages, videos, and other files on your site, as well as the relationships between them. Here’s a simple structure of a `sitemap.xml` file:
```xml
http://www.example.com/
2023-10-01
monthly
1.0
http://www.example.com/about
2023-09-15
yearly
0.8
http://www.example.com/contact
2023-09-20
yearly
0.5
```
In this example:
- <loc>: Specifies the URL of the page.
- <lastmod>: Indicates the last modified date of the page.
- <changefreq>: Suggests how frequently the page is likely to change.
- <priority>: Indicates the priority of the page relative to other pages on the site.
Make sure to replace the URLs and dates with those relevant to your site.