diff --git a/docs/metrics.md b/docs/metrics.md
index 938a83303268c95e104a18ea2a4812c4dce46cf9..38c55c0854c1d18830fb6448de814ca31f1d4596 100644
--- a/docs/metrics.md
+++ b/docs/metrics.md
@@ -121,8 +121,30 @@ metrics:
           regex: ".*_unwanted_metric"
 ```
 
+## 4. Pushing Metrics to Central Monitoring Infrastructure
+By default the Helm chart uses a dedicated Fluent Bit to upload the metrics to the Central Monitoring Infrastructure via OpenTelemetry protocol.
 
-## 4 . Further Customizations
+This Fluent Bit already has a default configuration for the inputs, filters and outputs. Please, check the `values.yaml` to see the default configuration.
+
+Besides these basic configuration options, others are also offered.
+
+### Fluentbit Custom Lua Scripts
+In Fluent Bit we can use Lua scripts to create processors that transform the records. These scripts are available in the Fluent Bit container under the path `/fluent-bit/etc/scripts`. In order to create new Lua scripts just add them in the values `logs.fluentbit.luaScripts` key.
+
+For example, the following configuration will create two files in `/fluent-bit/etc/scripts`. One named `my_lua_script.lua` and another one named `my_lua_script2.lua`.
+```yaml
+luaScripts:
+  my_lua_script.lua: |
+    function my_function(tag, timestamp, record)
+      // Do something...
+      return 2, timestamp, record
+      end
+  my_other_lua_script.lua: |
+    ...
+```
+
+
+## 5. Further Customizations
 
 You can further customize metrics collection with the following settings: