Last updated: 11 October 2026
This page explains which cookies and similar technologies perfometrics.co uses, why, and how you can control them. For everything else about your data, see our Privacy policy.
What cookies are
Cookies are small text files that a website stores in your browser. Similar technologies, such as local storage or tracking pixels, work in a comparable way. Some are needed for the site to work. Others help us understand how the site is used or measure our advertising.
Your choice
When you first visit, our cookie banner asks for your consent. Strictly necessary cookies are always active. Statistics and marketing cookies are only set if you agree. You can change or withdraw your choice at any time on the Your privacy choices page, and you can delete cookies in your browser settings at any time.
Legal basis: strictly necessary cookies under § 25(2) TDDDG and Art. 6(1)(f) GDPR; all other cookies only with your consent under § 25(1) TDDDG and Art. 6(1)(a) GDPR.
Strictly necessary
These keep the website secure and working, and remember your cookie choice. They cannot be switched off.
| Cookie | Provider | Purpose | Lifetime |
|---|---|---|---|
| _tracking_consent | Shopify | Stores your cookie choices | 1 year |
| _cmp_a | Shopify | Manages privacy and consent settings | 1 day |
| _shopify_essential | Shopify | Session and security functions of the store | Up to 1 year |
| keep_alive | Shopify | Keeps your session active while you browse | 30 minutes |
| localization | Shopify | Remembers language and region | 2 weeks |
| cart, cart_sig, cart_currency | Shopify | Shopping cart and checkout for digital products | Up to 2 weeks |
| secure_customer_sig | Shopify | Customer login, if you sign in | 1 year |
Statistics (with consent)
These help us understand how visitors use the site, which pages are useful and where people drop off.
| Cookie | Provider | Purpose | Lifetime |
|---|---|---|---|
| _shopify_y, _shopify_s | Shopify | Shopify Analytics: visits and sessions | 1 year / 30 minutes |
| _shopify_sa_t, _shopify_sa_p | Shopify | Shopify Analytics: traffic sources | 30 minutes |
| _ga, _ga_* | Google Analytics 4: distinguishes visitors and sessions | Up to 2 years | |
| _clck | Microsoft | Microsoft Clarity: stores a random visitor ID and settings so repeat visits are recognised | 1 year |
| _clsk | Microsoft | Microsoft Clarity: connects several page views into one session recording | 1 day |
| CLID | Microsoft (clarity.ms) | Microsoft Clarity: recognises first visits to sites using Clarity | 1 year |
| MUID | Microsoft (clarity.ms, bing.com) | Identifies the browser across Microsoft services for Clarity analysis | 1 year |
| ANONCHK | Microsoft (clarity.ms) | Technical check used together with MUID | 10 minutes |
Marketing (with consent)
These measure which ads lead to enquiries and, if you agree, let us show our ads to people who visited our site.
| Cookie | Provider | Purpose | Lifetime |
|---|---|---|---|
| _gcl_au | Google Ads conversion measurement | 90 days | |
| IDE, test_cookie | Google (doubleclick.net) | Google Ads remarketing and ad measurement | Up to 13 months |
Fonts
Our pages currently load the Nunito and Instrument Serif fonts from Google Fonts. This does not set cookies, but your browser connects to Google's servers and transmits your IP address. We are moving these fonts to our own hosting. Details are in section 8 of our Privacy policy.
Changes and questions
We update this list when we add or remove tools. Questions: contact@perfometrics.co.