To refresh/reload your webpage automatically,or refreshing/reloading page periodically, use the <meta> tag in your html document.
What is <meta> tag actually...?
The <meta> tag provides metadata about your HTML document, such as page description, keywords, author of the document, last modified etc. This data are used by browser, search engines, other web services. In certain cases the webserver uses theses valuesto further define the document content type to the browser. It is a machine parsable tag and will not be displayed by browser on webpages. This tag always put between <head>...</head>. The attributes of this tag are, content,http-equive,scheme,name and charset.
Browser uses the metadata - how to