Doc enhancement for eventstats and bin command

docs/user/ppl/cmd/bin.rst

@@ -9,6 +9,11 @@ bin
    :depth: 2
 
 
+.. note::
+
+   Available since version 3.3
+
+
 Description
 ============
 | The ``bin`` command groups numeric values into buckets of equal intervals, making it useful for creating histograms and analyzing data distribution. It takes a numeric field and generates a new field with values that represent the lower bound of each bucket.

docs/user/ppl/cmd/eventstats.rst

@@ -283,7 +283,17 @@ DISTINCT_COUNT, DC(Since 3.3)
 Description
 >>>>>>>>>>>
 
-Usage: DISTINCT_COUNT(expr), DC(expr). Returns the approximate number of distinct values of expr using HyperLogLog++ algorithm. Both ``DISTINCT_COUNT`` and ``DC`` are equivalent and provide the same functionality.
+Usage: DISTINCT_COUNT(expr), DC(expr). Returns the approximate number of distinct values using the HyperLogLog++ algorithm. Both functions are equivalent.
+
+**Algorithm & Accuracy:**
+The HyperLogLog++ algorithm provides memory-efficient cardinality estimation, avoiding the high memory usage and latency of exact hash set calculations. Counts are typically accurate up to the precision threshold and within 6% of true values in most cases.
+
+**Precision Control:**
+Use the ``precision_threshold`` setting to balance memory usage and accuracy. Values below this threshold are highly accurate, while higher values may be less precise.
+
+* Default: 3,000
+* Maximum: 40,000
+
 
 Example::
 

docs/user/ppl/index.rst

@@ -54,6 +54,8 @@ The query start with search command and then flowing a set of command delimited
 
   - `appendcol command <cmd/appendcol.rst>`_
 
+  - `bin command <cmd/bin.rst>`_
+
   - `dedup command <cmd/dedup.rst>`_
 
   - `describe command <cmd/describe.rst>`_