Update README.md

README.md

@@ -9,6 +9,8 @@ license: cc-by-nc-4.0
 
 ## How to use the model
 
+- **PRE-PROCESSING**: when you apply the model on tweets, please make sure that tweets are preprocessed by the [TweetTokenizer](https://github.com/VinAIResearch/BERTweet/blob/master/TweetNormalizer.py) to get the best performance.
+
 ```python
 from transformers import AutoTokenizer, AutoModelForTokenClassification