IELTS -International English Language Testing system:
There are mainly 2 categories- General and academic
IELTS Academic-it is needed if you are planning to enter an English -speaking educational institution.
IELTS General-it is often required by the embassies if you are planning to migrate to an English speaking country.
IELTS UKVI -International candidates who wish to pursue study ,job, or migrate to the Uk.
When applying for a UK student visa to work, migrate, study, or pursue vocational training, you must pass the IELTS UKVI examination, which is approved by the UK Visa and Immigration department. This test is for candidates from non-English speaking nations.
Exam issuing authority -can book above exams either through British council or IELTS IDP.
