1. Sitemap, check for your sitemap.xml file.
2. Robots. txt, is a text file that tells web robots which pages on your site to crawl.
3. Domain name. verification, with Google Webmaster Tools
4. SSL - (Secure Sockets Layer) is the standard security technology for an encrypted link between a web server and a browser.
5. Make your website Responsive, so it can be displayed on any device.
6. Fast loading graphics, the smaller in bytes, the better. The faster it can be displayed in the web, the better. A good website should be visible in less than 5 seconds.
Check your website score at
www.websitegrader.com
www.gtmetrix.com
