Update README.md

README.md

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 https://tristanthrush.github.io/perplexity-correlations/
 
 
+## Real-World Usage Examples
+
+Navigate to the `examples/` directory for examples of code that might be useful if you
+want to use our package in practice. We provide code to get BPB values and evaluations
+on practically any large group of Hugging Face LLMs, Eleuther Eval Harness benchmarks,
+and Hugging Face pretraining data samples. We also provide code for training fastText
+training data filters from our estimate. We've tried to make it easy to swap in other
+pretraining datasets, LLMs, evaluations, and cluster schedulers.
+
+
 ## Development guidelines
 
 Install the dev requirements and pre-commit hooks: