How do we use cookies?

When using Smartlook services and products, temporary files, called "cookies", can be stored, which may contain information capable of identifying the user. No personal data will be stored in the cookies.

SL_C_23361dd035530_KEY - this is the project key, specific to each project that you add to your Smartlook dashboard

SL_C_23361dd035530_SID - this is the session ID, that is assigned to each new session that is being recorded

SL_C_23361dd035530_VID - this is the visitor ID, assigned to each new visitor.

The cookies mentioned above are saved for 13 months and can be deleted manually by clearing the browser's cache.

AWSELB Cookie - Cookie AWS creates for efficient Load Balancing. More info on AWSELB can be found here - Configure sticky sessions for your Classic Load Balancer - Elastic Load Balancing

SL_C_23361dd035530_DOMAIN - this temporary cookie is used to detect base domain (a.k.a. second-level domain) and is removed immediately after the domain is detected. It helps us to share session between subdomain and domain if both are recorded in the same project.

Smartlook tracking script can also be used without these cookies:

<script type='text/javascript'>
window.smartlook||(function(d) {
var o=smartlook=function(){ o.api.push(arguments)},h=d.getElementsByTagName('head')[0];
var c=d.createElement('script');o.api=new Array();c.async=true;c.type='text/javascript';
smartlook('init', 'SMARTLOOK PROJECT KEY', { "cookies": false });

What are cookies used for and why we store them?

The use of cookies helps with the association of sessions (cookie SID) to users (cookie VID) and a corresponding project (cookie KEY).

Also, if you have two domains, e.g. and, and you record them under the same project, then visits to each domain will be connected under one session (cookie DOMAIN). When you replay the session, you can see how the user switched between and tabs.

NOTE: This information will only be shared when both domains are recorded within the same project and share the main domain name ( This cross tracking can only be achieved with cookies enabled. If you disable cookies, then you’ll lose this feature, and the visitor journey will be separated into 2 different sessions.

Cookie description you can use for your app users or website visitors

This website uses Smartlook. Analytical tool that uses cookies, text files stored on your device, used to analyze your behavior on the website. These cookies provide a way to anonymously connect visits of each visitor. Smartlook will use this information to provide insights into your usage of this website solely for the operator of this website.

You can opt out of data collection, and more information can be found in Smartlook's Terms of Service or Privacy Policy.

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