Legal
Cookie Policy
Last updated: October 2026
What are cookies?
Cookies are small text files placed on your device when you visit a website. They allow the site to remember your preferences and understand how you use it across visits.
Browser storage (local storage and session storage) works in a similar way, and this policy covers it too.
What cookies we use
Analytics and advertising
These show how visitors use the site, and which ads bring them. Their tags load through Google Tag Manager on every visit to cometlab.ai.
| Name | Provider | Purpose | Duration |
|---|---|---|---|
cl_anon_id | Comet Lab | A random visitor ID, linking your visits and any enquiry you send | 1 year |
_ga | Google Analytics | Tells visitors apart | 2 years |
_ga_23M3EFJ9DS | Google Analytics | Keeps track of your visit | 2 years |
_gcl_au | Google Ads | Measures visits and enquiries that follow a Google ad | 90 days |
_gcl_aw, _gcl_gs | Google Ads | Store the ad click when you arrive from a Google ad | 90 days |
_clck | Microsoft Clarity | Keeps your Clarity visitor ID | 1 year |
_clsk | Microsoft Clarity | Joins the pages of one visit into a single recording | 1 day |
CLID, MUID, MR, SM, SRM_B, ANONCHK | Microsoft Clarity, on clarity.ms and bing.com | Recognise your browser across sites that use Clarity | Up to 13 months |
__obref | OpenAI Ads | A random browser ID, to measure enquiries that follow an OpenAI ad | 1 year |
__oppref | OpenAI Ads | Stores the ad click when you arrive from an OpenAI ad | 30 days |
__cf_bm | OpenAI Ads, on openai.com | Protects OpenAI's measurement service from automated traffic | 30 minutes |
_cfuvid | OpenAI Ads, on openai.com | Protects OpenAI's measurement service from automated traffic | Until you close the browser |
Browser storage
The site and these providers also keep some data in your browser's storage.
| Name | Provider | Purpose | Duration |
|---|---|---|---|
cl_anon_id | Comet Lab | The visitor ID above, kept in local storage | Until you clear it |
cl_attribution | Comet Lab | How you first found the site: the ad, campaign or site that sent you, and the page you landed on | Until you clear it |
cl_last_touch | Comet Lab | The same details for your latest visit | Until you clear it |
cl_session_id | Comet Lab | Groups the pages of one visit | Until you close the tab |
cl_entry_cta | Comet Lab | The last button you clicked, recorded with a booking | Until you close the tab |
_gcl_ls | Google Ads | Google Ads measurement | Until you clear it |
_cltk | Microsoft Clarity | Clarity data for the visit | Until you close the tab |
oaiq_cs | OpenAI Ads | OpenAI pixel data for the visit | Until you close the tab |
How to manage cookies
You can block or delete cookies and browser storage in your browser settings:
Note: disabling cookies may affect the functionality of our booking and contact forms.
Contact
Questions? Email hello@cometlab.ai.