This cookie is used to determine unique visitors to the website and it is updated with each page view. Additionally, this cookie is provided with a unique ID that Google Analytics uses to ensure both the validity and accessibility of the cookie as an extra security measure.
This cookie stores the type of referral used by the visitor to reach the website, whether via a direct method, a referring link, a website search, or a campaign such as an ad or an email link. It is used to calculate search engine traffic, ad campaigns and page navigation within your own site. The cookie is updated with each page view to the website.
This cookie is used to establish and continue a user session with the website. When a user views a page on the website, the Google Analytics code attempts to update this cookie. If it does not find the cookie, a new one is written and a new session is established. Each time a user visits a different page on the website, this cookie is updated to expire in 30 minutes, thus continuing a single session for as long as user activity continues within 30-minute intervals. This cookie expires when a user pauses on a page on the website for longer than 30 minutes.
The _utmv cookie passes the information provided as a part of a custom user segment in the User-Defined report within Google Analytics, allowing us to perform analysis on visitors defined within a specific segment or value. This string is then passed to the Analytics servers in the GIF request URL via the utmcc parameter.
This cookie is no longer used by the Google Analytics tracking code to determine session status.
You can reject or delete these cookies by downloading and installing the Google Analytics Opt-out Browser Add-on available here