diff --git a/nncf/quantization/algorithms/weight_compression/scale_estimation.py b/nncf/quantization/algorithms/weight_compression/scale_estimation.py
index b7d3f263b52..156335e43b5 100644
--- a/nncf/quantization/algorithms/weight_compression/scale_estimation.py
+++ b/nncf/quantization/algorithms/weight_compression/scale_estimation.py
@@ -10,7 +10,7 @@
 # limitations under the License.
 
 from copy import deepcopy
-from typing import Any, Dict, List, Optional, TypeVar
+from typing import Any, Dict, List, Optional, Tuple, TypeVar
 
 from nncf import Dataset
 from nncf.common.graph.graph import NNCFGraph
@@ -301,7 +301,15 @@ def apply(
         return res
 
 
-def get_target_zero_mask(compressed_weights, zp=None):
+def get_target_zero_mask(compressed_weights: TTensor, zp: Optional[TTensor] = None) -> Tuple[TTensor, TTensor]:
+    """
+    Computes the target values and a mask indicating zero values in the target.
+
+    :param compressed_weights: The compressed weights tensor.
+    :param zp: The zero point tensor.
+    :return: The compressed weights optionally adjusted by the zero point and
+        a boolean mask indicating positions in the target that are close to zero.
+    """
     target = compressed_weights
     if zp is not None:
         target = target.astype(dtype=zp.dtype) - zp
@@ -309,7 +317,16 @@ def get_target_zero_mask(compressed_weights, zp=None):
     return target, zero_mask
 
 
-def estimate_scales(weight, target, zero_mask, importance):
+def estimate_scales(weight: TTensor, target: TTensor, zero_mask: TTensor, importance: TTensor) -> TTensor:
+    """
+    Estimates scales for the given weight, target, zero mask, and importance.
+
+    :param weight: The weights tensor.
+    :param target: The target values tensor.
+    :param zero_mask: A boolean mask indicating positions in the target that are close to zero.
+    :param importance: The importance values tensor.
+    :return: The estimated scales
+    """
     ideal_scale = fns.abs(weight) / (fns.abs(target) + zero_mask)
     weighted_scale = ideal_scale * importance
     near_to_ideal_scale = fns.sum(weighted_scale, axis=2, keepdims=True)