Proficiency Test: "An exam which tests how proficient or skilled someone is in a particular activity, field of study, language, etc"
(Collins Dictionary)
Reasons To Take the Test:
Duration of the certificate:
Note that most language proficiency tests' certificates are valid for a determined amount of time. For example: 2 years.
So make sure to only take the exam when needed.
Examples of Proficiency Tests:
Test of English as a Foreign Language is a standardized test to measure the English language ability of non-native speakers wishing to enroll in English-speaking universities. The test is accepted by more than 11,000 universities and other institutions in over 190 countries and territories.
Certificate Validity: 2 Years
Types:
Test Sections:
Selected Resources from the Library:
Official TOEFL IBT Tests Volume 2, Second Edition by 
McGraw-Hill Education TOEFL IBT with 3 Practice Tests and DVD-ROM by 
Cambridge Preparation for the TOEFL® Test by 
The International English Language Testing System, is an international standardized test of English language proficiency for non-native English language speakers. It is jointly managed by the British Council, IDP: IELTS Australia and Cambridge Assessment English, and was established in 1989.
Certificate Validity: 2 Years
Types:
Test Sections:
Selected Resources from the Library:
Official IELTS Practice Materials 1 with Audio CD by 
Exam Essentials Practice Tests: IELTS with Answer Key by 
Teaching English as a second language (TESL) or Teaching English to speakers of other languages (TESOL) are terms that refer to teaching English to students whose first language is not English.
Certificate Validity: Doesn't expire
Types:
To know more about each type: Click here!
Difference between TEFL And TOEFL/IELTS:
While TOEFL and IELTS are exams that you need to take and pass, TEFL Is a certificate which you can gain by enrolling in one of the courses offered by the TEFL org.
Courses:
You can join the TEFL courses from the following link: Click here!
