Raw web pages are terrible training data. Nav bars, cookie banners, "related articles" and ads drown the signal, and near-identical syndicated text pollutes the corpus. If you're fine-tuning a domain model — legal reasoning, medical QA, financial analysis — you want clean vertical text with pro...
Source: [Dev.to](https://dev.to/darksider4all_afa2428f63d0/building-a-vertical-corpus-builder-clean-jsonl-datasets-for-llm-fine-tuning-2p32)