I am now doing the SEO part of our final project and I have just found Google's algorithm for defining the quality score of the web sites. they're not exactly the same as those in our slides

Quality score factors for Google AdWords

Below is the most recent update of factors that go into your Quality Score on Google. The biggest change since the previous update has to do with how well you target the different types of devices that can be used for doing the search.

Your keyword's past clickthrough rate (CTR): How often that keyword led to clicks on your ad. Or clicks divided by impressions.

Your display URL's past CTR: How often you received clicks with your display URL.

Your account history: The overall CTR of all the ads and keywords in your account.

The quality of your landing page: How relevant, transparent, and easy-to-navigate your page is.

Your keyword/ad relevance: How relevant your keyword is to your ads.

Your keyword/search relevance: How relevant your keyword is to what a customer searches for.

Geographic performance: How successful your account has been in the regions you're targeting.
Your ad's performance on a site: How well your ad's been doing on this and similar sites (if you're targeting the Display Network)

Your targeted devices: How well your ads have been performing on different types of devices, like desktops/laptops, mobile devices, and tablets—you get different Quality Scores for different types of devices