The UKVI can interview Tier 4 applicants before granting a visa. If you are selected for an interview you will be sent an email, so please remember to check your junk inbox. If you do not attend your meeting your application could be refused.
Interviews take place when you attend a visa application centre to give your biometric information.
A member of staff will ask you about your course, where you want to study and your reasons for studying in the UK.
Interviews are conducted in English and possibly via video link.
The report of the interview will be sent to the Entry Clearance Officer who makes the decision on your Tier 4 application.
The Entry Clearance Officer must be satisfied that you are a genuine student, and that your English language ability is at the correct level, otherwise you might be called for a further interview and/or your entry clearance application may be refused.
You can find further information about credibility interviews here.