By default, some data is collected by HF libraries (`transformers`, `datasets`, `gradio`,..) to monitor usage, debug issues and help prioritize features.
Each library defines its own policy (i.e. which usage to monitor) but the core implementation happens in `huggingface_hub` (see [`send_telemetry`]).  
You can set `HF_HUB_DISABLE_TELEMETRY=1` as environment variable to globally disable telemetry.