The TOEFL® test measures English language proficiency in speaking, listening, reading, and writing at the college/university level. The vast majority of people take the Internet version of the TOEFL test (TOEFL iBT). The TOEFL PBT®, an alternate version, is only offered in a few places that do not have internet access.
The TOEFL test has four sections: Reading, Writing, Listening, and Speaking. However, you will also be required to combine skills in these four areas to correctly answer the questions.