Why do the questions that we post can be viewed from google?

Google picks up many or all websites.

I have sometimes noticed them listed on Google within a few minutes of the posting of the question

The questions that you post can be viewed from Google for a couple of reasons. First, many websites and platforms are designed to be indexed by search engines like Google, which means that the content on those sites can be discovered and displayed in search results. This enables users to find and access the information they are looking for quickly and easily.

Secondly, search engines employ algorithms to crawl and index web pages. These algorithms scan the internet, analyzing the content of web pages and categorizing them according to relevancy and quality. When you post a question on a platform that is accessible to search engine crawlers, like Google, it can index that question and associate it with the relevant web page or platform where it was posted.

In the case of posting questions on platforms like forums or question-and-answer sites, the goal is often to crowdsource information and receive answers from other users. Making those questions viewable on search engines allows a wider audience of people to potentially see and respond to the question, increasing the chances of getting helpful answers.

However, it's worth noting that not all questions or platforms are indexed by search engines. Some platforms may have measures in place to restrict access to certain content from search engine crawlers for privacy or security reasons. Additionally, some websites may use special tags or settings to indicate that certain content should not be indexed by search engines.