Update README.md

README.md

@@ -303,6 +303,10 @@ Also check my other collections [awesome e-commerce](https://github.com/frutik/a
 * [Broad and Ambiguous Search Queries - Recognizing When Search Results Need Diversification](https://dtunkelang.medium.com/broad-and-ambiguous-search-queries-1bbbe417dcc)
 * [Thoughts on Search Result Diversity](https://dtunkelang.medium.com/thoughts-on-search-result-diversity-1df54cb5bf4a)
 
+#### MMR
+
+* [How to Calculate MMR?](https://www.analyticsvidhya.com/blog/2024/07/hit-rate-mrr-and-mmr-metrics/#h-how-to-calculate-mmr)
+
 ### Personalisation
 
 * [Patterns for Personalization in Recommendations and Search](https://eugeneyan.com/writing/patterns-for-personalization/)