Onsite report factor for a new websites.

Factor	What	Why
Favicon		Favicon is very important for a website. It’s also known as a shortcut icon or website icon which must be present.
SSL		Secure Sockets Layer (SSL) is a standard security technology for establishing an encrypted link between a server and a client.
Mobile Friendly Test		Mobile Friendly. A mobile friendly website is essentially when your regular website shrinks down to be small enough to display on a mobile device. It looks like a tiny version of your website.
Canonical Tag		Test your site for potential URL canonicalization issues. Canonicalization describes how a site can use slightly different URLs for the same page (for example, if http://www.example.com and http://example.com displays the same page but do not resolve to the same URL). If this happens, search engines may be unsure as to which URL is the correct one to index.
http & https Version		If the website is opening with both http and https version then it is causing duplication issue. Google will penalize a website having duplicate version existing.
www & Non-www Version		It is a problem because Google sees www and non-www versions of your sites as different subdomains.
HTML Validation		Invalid code may be interpreted inconsistently by some browsers, which can impact on the look or functionality of your site and, therefore, the way some users interact with it. So we must edit or remove all the invalid codes from the website.
CSS Validation		It is recommended to use valid CSS to ensure that the website displays correctly.
XML Sitemap		An XML sitemap is a way for website owners to tell search engines about all the pages that exist on their website.
HTML Sitemap		HTML sitemap is just a page with links on it, preferable key-worded links that describes what that page is about so that a user can click on the site map and see exactly what you have on your website.
Robots.txt		The robots.txt is a standard used by websites to communicate with web crawlers and other web robots.
Google Webmaster		Google Webmaster Tool is the technical interface to identify the website crawl error, duplicate content, link, sitemap etc. So access to this tool helps to fix all the issues present over the Website.
Google Analytics		Google Analytics is a free web analytics service offered by Google that tracks and reports website traffic. Google Analytics is now the most widely used web analytics service on the Internet.
Broken Links		Broken link or dead link are same for a website. Broken link is a hyperlink of a particular page that indicate to a page which has been deleted or moved permanently.
Internal Links		The total number of links existing in the page cannot be more than 100.
Image optimization		Images' file names and alt text are optimized to include the primary keyword phrase associated with the page
Indexed Pages		Indexed Pages plays a virtal role as search engine ranking factor. It is the process to how many pages Google have detected on your website. Your website will be indexing easily if you use proper Meta title and Meta descriptions as per search engine algorithm.
Google Cache		Google cache helps to know the last crawling day when Google bot have visited your website.
Customized 404 Error Page		A 404 page is the webpage served to a user who tries to access a page that cannot be located at the URL provided.
Social Prove
301 redirect