sitemap.xml
A `sitemap.xml` file is used to inform search engines about pages on a site that are available for crawling. Here is a simple structure of what a `sitemap.xml` might look like:
```xml
https://www.example.com/
2023-10-01
monthly
1.0
https://www.example.com/about
2023-09-15
yearly
0.8
https://www.example.com/contact
2023-08-20
yearly
0.5
```
In this example:
- loc: The URL of the page.
- lastmod: The date when the page was last modified.
- changefreq: How frequently the page is likely to change (e.g., daily, weekly, monthly, yearly).
- priority: The priority of the page relative to other pages on the site (values range from 0.0 to 1.0).
This format helps search engines index the site more efficiently and improve visibility in search results.