Update README.md

README.md

@@ -27,7 +27,7 @@ It is part of the **family of MosaicBERT-Base models** trained using ALiBi on di
 * [mosaic-bert-base-seqlen-1024](https://huggingface.co/mosaicml/mosaic-bert-base-seqlen-1024)
 * mosaic-bert-base-seqlen-2048
 
-
+The primary use case of these models is for research on efficient pretraining and finetuning for long context embeddings.
 
 ## Model Date