> ## Documentation Index > Fetch the complete documentation index at: https://docs.bchic.de/llms.txt > Use this file to discover all available pages before exploring further. # Key Metrics Explained > A detailed glossary of key web analytics metrics. Understand what visitors, sessions, and bounce rate mean within our privacy-focused, cookieless system. ## The Building Blocks of Your Analysis: A Privacy-Focused Approach Every analysis begins with understanding the fundamental metrics. Our platform uses a **privacy-focused, cookieless approach**. This means we do not store persistent cookies in your users' browsers. Instead, we use an anonymized identifier that rotates daily. This method has a direct impact on how "visitors" are counted and interpreted. This page explains the meaning and nuances of each metric in this context. *** ### Visitors (Unique Visitors) * **What it measures:** The number of unique, anonymized identifiers that have visited your website within a single 24-hour window. * **How it works:** When a user visits your site, an anonymized identifier is generated from their IP address and other browser characteristics. A daily rotating "salt" (a random string) ensures that this identifier is only valid for 24 hours. This protects your users' privacy, as they cannot be tracked across multiple days. * **The 24-Hour Rule:** * If a user visits your site on Monday at 10 AM and again at 3 PM, they are counted as **one** visitor. * If the same user visits the site again on Tuesday, they receive a new, anonymous identifier and are counted as a **new, additional visitor** for that day. * **How to interpret this:** This metric is perfect for measuring your daily reach. It shows how many different people you reached on a specific day. It is **unsuitable for analyzing returning visitors over longer periods (e.g., a week or month)**. Instead, look at trends in your daily visitor count to evaluate your growth. *** ### Pageviews * **What it measures:** The total number of pages viewed. * **How it works:** Every time a page on your website is loaded or reloaded (refreshed), it counts as one pageview. This metric is unaffected by the cookieless approach. * **How to interpret this:** This number becomes interesting in relation to other metrics. `Pageviews / Visitors` gives you the average number of pages a visitor views per day and is a strong indicator of engagement with your content. *** ### Sessions * **What it measures:** A continuous period of interactions from a single visitor on your website. * **How it works:** A session begins when a visitor arrives on your site. It automatically ends after 30 minutes of inactivity. All actions within this timeframe belong to the same session. If the same user (within the 24-hour window) returns after more than a 30-minute break, a new session begins. * **How to interpret this:** The number of sessions is always greater than or equal to the number of visitors. The `Sessions / Visitors` ratio shows you how often an average visitor returns to your site **within a single day**. It's a measure of immediate relevance or the "binge-watching" of your content in one day. *** ### Bounce Rate * **What it measures:** The percentage of sessions in which only a single page was viewed and no other interaction took place. * **How it works:** A "bounce" occurs when a visitor lands on a page and then leaves without clicking another link or triggering an event. `Formula: (Number of Bounces / Total Number of Sessions) * 100%`. This calculation is unaffected by the cookieless approach. * **How to interpret this:** Context is crucial. * **Commercial sites:** A high bounce rate is often an alarm signal. * **Informational sites (blogs, news):** A high bounce rate can mean the user found their answer quickly and was satisfied. *** ### Engagement Rate * **What it measures:** The percentage of sessions in which the user became active. It is the exact opposite of the Bounce Rate. * **How it works:** A session is considered "engaged" if, for example, more than one page was viewed or the session lasted longer than 10 seconds. This is often a fairer metric than bounce rate. * **How to interpret this:** A high engagement rate is almost always a good sign of your content's quality and your site's usability. *** ### Avg. Session Duration * **What it measures:** The average length of a session. * **How it works:** It measures the time between the first and last event in a session. The time spent on the **last page** of a session cannot be measured, which can make this metric slightly inaccurate. * **How to interpret this:** A high value on a blog is good (the visitor is reading). A high value on a checkout page is bad (the visitor is having trouble). *** ### Events * **What it measures:** Specific interactions (e.g., clicks, form submissions) that you define as important. * **How it works:** Events are custom actions and are counted independently of pageviews. They are the most powerful tool for measuring conversions. * **How to interpret this:** Use events to measure the true success of your website, such as the number of purchases, sign-ups, or downloads.