diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2cbfb6e7..4a8a10b6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## [unreleased]
+### Added
+- Improve report explanation to better interpret average coverage and coverage completeness stats shown on the coverage report
+
 ## [1.9]
 ### Added
 - Condensed `/coverage/d4/genes/summary` for condensed stats over a gene list
diff --git a/src/chanjo2/templates/report.html b/src/chanjo2/templates/report.html
index 8081749a..df48f9bc 100644
--- a/src/chanjo2/templates/report.html
+++ b/src/chanjo2/templates/report.html
@@ -179,10 +179,16 @@ <h4>General</h4>
   </p>
 {% endif %}
 
+<p>
+  <strong>Average coverage</strong>:
+  defined as the mean coverage over a list of genes. Values were calculated as the mean of coverage values over single genes or intervals (transcripts or exons) from single genes
+  e.g. 38.24
+</p>
+
 <p>
   <strong>Completeness</strong>:
   defined as the ratio of bases
-  sequenced deeper than a specified cutoff
+  sequenced deeper than a specified cutoff. Values were calculated across pooled genes or genes' intervals, according to the sequencing technology used
   e.g. 10x
 </p>