The idea behind quickly understanding a long complex document is by searching for specific keywords. Then you look for specific action words in the section where the keyword was found. Be sure to use your keyboard shortcuts (CTRL+F or COMMAND+F) to search in your browser.
Major search engines and social media giants are on this list. Search for keywords like “Google, Facebook, Twitter, LinkedIn, Bing, Yahoo, analytics, 3rd party, third party” and look for action words like “tracking, storage, transactions, sell”.
How other services use your data is important as you are not only providing your personal data to the website you use but also to those 3rd party services.
Check if there is a section explaining what happens to your data if you decide to close or remove your account. Search for keywords like “close, remove, delete” and look for action words like “removed, moved, days, hours, flagged”.
Does the data get removed or does the website keep it around? How long will the site store your information? If you can't find this section, email the website and ask them why there is no section about this. Many websites ignore this section and ask you to e-mail them to close your account.
If the date is not visible near the main heading, search for keywords like “last update, modified, created, (your current year, example: 2019)” and no action words are needed here as this is most likely a single sentence.
Write to them on Twitter, like we have been doinghere,here, andhere.