Web Scraping without getting blocked

Web scraping or crawling is the fact of fetching data from a third party website by downloading and parsing the HTML code to extract the data you want. But you should use an API for this! Not every website offers an API, and APIs don't always expose every piece of information you need. So it's often the only solution to extract website data. So, what is the problem? The main problem is that most websites do not want to be scraped.