What Are Cookies?
Cookies are small files which are stored on a user's computer. They are designed to hold a modest amount of data specific to a particular client and website, and can be accessed either by the web server or the client computer. This allows the server to deliver a page tailored to a particular user, or the page itself can contain some script which is aware of the data in the cookie and so is able to carry information from one visit to the website (or related site) to the next.
What Are the third-party cookies?
A third-party cookie is one that is placed on a user’s hard disk by a Web site from a domain other than the one a user is visiting.
As with standard cookies, third-party cookies are placed so that a site can remember something about you at a later time. Both are typically used to store surfing and personalization preferences and tracking information.
Third-party cookies, however, are often set by advertising networks that a site may subscribe to in the hopes of driving up sales or page hits.
Third-party cookies are often blocked and deleted through browser settings and security settings such as same origin policy; by default, Firefox blocks all third-party cookies. Blocking third-party cookies does not create login issues on websites (which can be an issue after blocking first-party cookies) and may result in seeing fewer ads on the Internet.
Which type of cookies we use? how does they work?
_utma; _utmb; _utmc; _utmt; _utmv; _utmz: These cookies are called "Google Analytics Cookies", you can find them in all websites.
The __utma Cookie: This cookie is what’s called a “persistent” cookie, as in, it never expires (technically, it does expire…in the year 2038…but for the sake of explanation, let’s pretend that it never expires, ever). This cookie keeps track of the number of times a visitor has been to the site pertaining to the cookie, when their first visit was, and when their last visit occurred.
Google Analytics uses the information from this cookie to calculate things like Days and Visits to purchase.
The __utmb and __utmc Cookies: The B and C cookies are brothers, working together to calculate how long a visit takes. __utmb takes a timestamp of the exact moment in time when a visitor enters a site, while __utmc takes a timestamp of the exact moment in time when a visitor leaves a site. __utmb expires at the end of the session.
__utmc waits 30 minutes, and then it expires.
You see, __utmc has no way of knowing when a user closes their browser or leaves a website, so it waits 30 minutes for another pageview to happen, and if it doesn’t, it expires.
The __utmz Cookie: __utmz keeps track of where the visitor came from, what search engine you used, what link you clicked on, what keyword you used, and where they were in the world when you accessed a website. It expires in 15,768,000 seconds – or, in 6 months. This cookie is how Google Analytics knows to whom and to what source / medium / keyword to assign the credit for a Goal Conversion or an Ecommerce Transaction. __utmz also lets you edit its length with a simple customization to the Google Analytics Tracking code.
The __utmv Cookie: If you are making use of the user-defined report in Google Analytics, and have coded something on your site for some custom segmentation, the __utmv cookie gets set on the person’s computer, so that Google Analytics knows how to classify that visitor. The __utmv cookie is also a persistent, lifetime cookie.
Is_Mobile: A simple cookie that allow you to visit our website from your mobile phone.
Language: The cookie that allow you to chose the language before enter in our website.
Mc_quantserve: It's a Third-Party Cookie.
The mc cookie set by quantserve appears to be related to advertising, and may track your behaviour on our website.