Regular updation to maintain results in SEO

For better SEO and ORM it is really important to monitor all the activities regularly. Suppose you are creating a blog or website. After indexing the blog in search engine and creating the sitemap also it is really important to upload something new on a regular basis so as to maintain its position in search engine. Other than this it is really important to upload fresh content else it will be useless to upload something regularly.
In SEO it is really important to be updated else you will loose the chance to stand anywhere in the the field.