The XML sitemap can be generated using online tools. Once the xml sitemap is generated, it looks something like this. The code consists of xml tags. The code is in written in between the “urlset” tags.
It includes-
1) The “url” tag contains the URL entries.
2) The URL of the page in “loc” tag.
3) The time (yearly, monthly, weekly or daily) when that page is likely to be modified.
4) The time when the page was last updated in “lastmod” tag.
5) The priority of the mentioned URL relative to other URL present in the site under “priority” tag.
The priority tag, lastmod tag, and the changefreq tag are optional i.e. you can choose whether have them mentioned or not in the sitemap. But the sitemap must contain the “loc” tag