Merge pull request #143 from borislobanov92/docs/linking-and-tagging

docs: added a code example with linking and tagging

README.md

@@ -26,6 +26,7 @@ Fingerprint is a device intelligence platform offering 99.5% accurate visitor id
 - [Requirements](#requirements)
 - [Installation](#installation)
 - [Getting started](#getting-started)
+- [Linking and tagging information](#linking-and-tagging-information)
 - [Caching strategy](#caching-strategy)
 - [Error handling](#error-handling)
 - [API Reference](#api-reference)
@@ -187,6 +188,29 @@ export default App;
 
 See the full code example in the [examples folder](https://github.com/fingerprintjs/fingerprintjs-pro-react/tree/main/examples/create-react-app).
 
+## Linking and tagging information
+The `visitorId` provided by Fingerprint Identification is especially useful when combined with information you already know about your users, for example, account IDs, order IDs, etc. To learn more about various applications of the `linkedId` and `tag`, see [Linking and tagging information](https://dev.fingerprint.com/docs/tagging-information).
+
+Associate your data with a visitor ID using the `linkedId` or `tag` parameter of the options object passed into the `useVisitorData()` hook or the `getData` function:
+```jsx
+// ...
+
+function App() {
+  const {
+    isLoading,
+    error,
+    getData
+  } = useVisitorData({
+    linkedId: "user_1234",
+    tag: {
+      userAction: "login",
+      analyticsId: "UA-5555-1111-1"
+    }
+  });
+
+// ...
+```
+
 ## Caching strategy
 
 Fingerprint Pro usage is billed per API call. To avoid unnecessary API calls, it is a good practice to cache identification results. By default, the SDK uses `sessionStorage` to cache results.