Sitemap is important to get your blog posts/content indexed in search engine especially Google Search. This will help search engine understand your blog structure, indexed your content every time you post a new content and of course a good SEO for your blog.
It is easy, just log in to webmaster tools - Crawl -Sitemap. Click add/test sitemap button, fill the blank box with the following sitemap code.
Add each one at a time and after adding the sitemap code click submit. You will need to wait a few minutes for the sitemap to be processed and after that refresh the page.
However, each sitemap above will show 25 or 26 URL Submitted/Indexed, and it means only 26 posts are submitted and indexed. So to make sure all of your content and posts index and visible on Google Search Engine, you need to add a custom atom sitemap.
Note that the sitemap above will submit 1-500 posts, which means maximum 500 posts will be submitted by this sitemap. If you have more posts, just add the following code:
You can always add more sitemap depends on your posts numbers by changing the index and max-result value by 500. For example, you have a blog with 2600 posts, so break down the posts by 500 you will have:
2500-3000 (sitemap can have max 500 URL that is why we write 3000 instead of 2600)
Now, just use the value above and covert in to create your sitemap, your sitemap will look like this:
What if I have 1000 posts and I add "atom.xml?redirect=false&start-index=1001&max-results=1500". No problem at all, however the URL submitted will show 0, the value 0 will changes after you add more posts (posts count is more than 1000).