These are the meta tags used in the web pages developed in class.

SEO Guidelines

Notify Google of mobile sites - as the world is going towards the mobile direction, it is important to let Google know that your website is "mobile friendly" using a Mobile Sitemap.
Create unique, accurate page titles - pages titles are very important for search engines, as they are displayed in the search results. Using unique and accurate page titles help users to recognize if the page is likely to be relevant to their searches.
Improve the structure of the URL - shorter URLs are more friendly to the users, and longer ones are usually confusing and unfriendly. URLs containing relevant information provide both users and search engines more information about the page than an ID or oddly named parameter would.
Optimize your use of images - it's important to think about accessibility and also browsers that don't support images or are using alternative technologies such as a screen reader. Using the alt attribute on image tags allows you to specify alternative text for the image if it cannot be displayed for some reason.