International English Language Testing System (IELTS), Testing of English as a Foreign Language (TOEFL), and Test of English for International Communication (TOEIC) success are needed by ESL students for several reasons.
Some students are wanting high score certifications for continued education in English speaking countries. The higher the score the more choices you have as far as a university’s given minimal requirements. Students planning to continue their education in the USA will also undergo the SAT test or an equivalent test for general knowledge leveling before entering a university.
Students that want to work in and English speaking country need one of the mentioned certifications for immigration requirements as well as working permit. Again the higher the certified score the more marketable you are, it can also be a negotiation point for better pay and future advancement within the organization.
Just to immigrate to some English speaking countries will require a minimal English competency. Different counties have their own specific requirements for English competency.
TOEIC has two parts Listening/Reading and Speaking/Writing you can take one or both parts depending on your reason(s) for needing it and the requirements of the English speaking country such as Canada’s immigration requirements.
The best all-around test is the IELTS and TOEFL four part English certification examination. These tests include the four areas of English skills: listening, reading, speaking and writing. Anybody going to an English language country and expecting to prosper academically or as part of the work force should realize the importance of all the skills involved with the language. If you’re not sure of your exact plans and want to get a head start in any future that involves migrating to an English speaking country, I would suggest the Cambridge IELTS or iTB TOEFL preparation programs. Plan to get the highest band score possible. These certification exams are not cheap and are valid for two years.
This is just a general answer to why students need these certified test. Go anywhere online to find your exact answer or ask your question here and I will research the best answer for you.