Updated: May 25, 2018
By accessing and using our site without disabling cookies on your device or opting out of third-party cookies, you consent to our use of these cookies and the information we collect with them. If you do not consent, please disable or block cookies in your browser using the methods described below under “How to Control Cookies” or using the opt-out links provided in the “Cookies Set by Third Parties” section. For more detailed information about what data we collect from our users, please read our Privacy Notice.
What are Cookies?
Cookies are small text files that a website saves on your computer or mobile device when you visit that website. These cookies enable the website to remember your actions and preferences for a period of time, so that you don’t have to re-enter them each time you come back to the website or browse from one page to another.
Cookies set by Quizlet
For some features of the website, it’s necessary to store data temporarily on one page so that we can use it again on another. For example, if you are referred by another user to Quizlet, a referral code is stored in a cookie so that, if you chose to upgrade, we can credit that other user with the referral. User Input cookies are persistent cookies with durations of anywhere from several days to several years.
User Input cookies can be opted out of using the directions in the “How to Control Cookies” section; however, doing so may break certain functionality on Quizlet.
Security cookies can be opted out of using the directions in the “How to Control Cookies” section; however, doing so will break most functionality on Quizlet.
When you log in to your Quizlet account, we set an encrypted cookie that uniquely identifies you so that on subsequent visits to quizlet.com you automatically stay logged in. This is a persistent cookie that expires in 90 days and is refreshed when you visit Quizlet.
The authentication cookie can be opted out of using the directions in the “How to Control Cookies” section; however, doing so will prevent you from being able to log in to Quizlet.
Many features of the website will store your preferences about how that feature is displayed or used in a cookie. For example, if you study a Quizlet study set in Test Mode, your preferences about how many and what kinds of questions appear in the test are stored in a cookie. Cookies that store preferences can be set with durations anywhere from just the current session up to a year.
Preferences cookies can be opted out of using the directions in the “How to Control Cookies” section; however, doing so will break all functionality which relies on them for storing preferences.
In order to understand how users interact with specific features of Quizlet and to further improve our website, we sometimes collect anonymous data about website usage and store it in cookies. We also set a cookie containing a unique, random value so that we can anonymously identify you each time you come to the website. These cookies can be set with durations anywhere from just the current session up to several years.
Analytics cookies can be opted out of using the directions in the “How to Control Cookies” section.
Cookies Set by Third Parties
Beyond the cookies we set ourselves, we also work with various reputable companies to provide certain services on Quizlet, like advertising, and to help us analyze how visitors use Quizlet and optimize their experience. In general, these cookies:
- Enable features and experiences on Quizlet that are tailored to your activity and preferences
- Collect information on your and other users’ preferences in order to create more useful products
- Maintain Quizlet’s regular business operations by facilitating one-time pop-ups, user communications and notices, onboarding experiences, and by collecting impressions and click data
- Allow Quizlet and our partners to serve relevant advertising to you in order to support our growth as a business and provide many services free of charge
- Help diagnose and correct downtime, bugs, and errors in our code to ensure that our products are operating efficiently
Below we provide more information on these companies and the cookies they may set.
AdRoll is a service that allows us to track the performance of ads we place about Quizlet on other sites. More information about this cookie can be found here. You can opt out of this cookie by visiting the AdRoll opt-out page.
More information about the purpose of these cookies can be found here. You can opt out of the authentication cookie using the directions in the “How to Control Cookies” section, however doing so may prevent you from being able to access Quizlet.
comScore (Scorecard Research)
We also partner with a number of Ad Exchanges on Doubleclick, some of whom may use additional cookies to help serve you more relevant advertising. These partners include:
- AerServ - You can learn how to modify your personalized ad preferences, including disabling personalized ads on AerServ here.
- Criteo - You can learn how to modify your personalized ad preferences, including disabling personalized ads on Criteo) here.
- Distric M - You can learn how to modify your personalized ad preferences, including disabling personalized ads on Distric M here.
- Pubmatic - You can learn how to modify your personalized ad preferences, including disabling personalized ads on Pubmatic here.
Quizlet utilizes Google Analytics Advertising Features, including Google Analytics Demographics and Interest Reporting.
In addition to cookies, we also use similar technologies on Quizlet which capture and store user data as outlined below.
Clear GIFs, also known as web beacons or pixel tags, are small images that appear in the emails we send to our users, and are used to track whether the email is opened or forwarded to other people. Having this information gives us a better understanding of the usefulness and relevance of the emails we send to our users.
If you no longer wish to receive promotional email communications from us, you can click on the unsubscribe link at the bottom of any such email.
HTML 5 Local Storage
HTML 5 local storage is an industry-standard technology for storing data in the browser that is very similar to cookies. The difference is that the data is only available in your browser, unlike cookies which are transmitted back to the server as part of loading a new page. DoubleClick and Google Analytics may sometimes put data into local storage, and we use their services for the reasons outlined above.
In some browsers you are able to clear your local storage in a similar way to clearing cookies. Please consult the relevant documentation for your browser for further details.
How to Control Cookies
In addition to opting out of third party cookies as described above, you can also control and delete cookies used by Quizlet at any time. For instructions on how to do this, which may vary depending on what browser you are using and where you are located, visit aboutcookies.org or youronlinechoices.com. You can delete all existing cookies on your computer and set most browsers to prevent them from being placed. However, please note that if you do this, you will no longer be able to log in to your Quizlet account and many of the study modes and other functionality on our website will not work properly.