Question: Who Can See and Read My Twitter Posts?
Answer: By default, Twitter accounts are set up to be public. That means your Twitter posts are visible to anyone who has access to the Internet. People can find them on the public Twitter timeline (visible by selecting the "Everyone" tab from your Twitter home page), by visiting your profile URL, or through search engine keyword searches. Alternately, you can configure your Twitter account to protect your profile. Doing so requires that you approve all new followers, your updates are only visible to those followers, and your posts are not included in web searches.