The International English Language Testing System (IELTS) is a test meant for anyone who wants to pursue an academic or professional career internationally. It includes IELTS Academic and IELTS General Training.
However, if you are applying for a UK visa, you need to take an IELTS test approved for UK Visa and Immigration (UKVI) purposes known as IELTS for UKVI. This applies to everyone coming from a non-English speaking country.
While there is no change in the content, format or level of difficulty and scoring, IELTS for UKVI simply follows certain extra security protocols to ensure the authenticity of the test taker. Also, your Test Report Form (TRF) may look slightly different from the one give for IELTS Academic or General Training.