Many web sites like Twitter, YouTube, or Facebook provide an easy way to access their data through a public API. All the information that you obtained using API is both well structured and normalized. For example, it can be in the format of JSON, CSV, or XML.

Taking data either directly from an API is the easiest way to download datasets from websites. What to do if owners of a web site don’t grant access to their users through API?

Web data extraction or web scraping is the only way to get desired data if owners of a web site don’t grant access to their users through API. Web Scraping is the data extraction technique that substitutes manual repetitive typing or copy-pasting.

This article covers the best strategies of web scraping in 2020.
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