Look for .json , .csv , or .py files to understand what you have. To give you a better guide, could you tell me: Where did you download this file from?
Download and install 7-Zip to extract the contents. Right-click the file and choose "Extract Here" or "Extract to..." Twitter020.7z
Check for README.md or README.txt for instructions from the creator. Look for
Use The Unarchiver to open the file.
are you trying to achieve with it (e.g., analyze data, run a bot, view archived tweets)? To give you a better guide, could you tell me: Where did you download this file from? Look for .json