License Type Check - F5-BIG-VE-BTA-1G-V18

And when to use this License which comes with BTA in it  ?

Hello f5Subrun​, 

From BT vs BTA | DevCentral it is is Best License with Advanced WAF added. As for when to use the license, that is something I would suggest speaking with either your SE, sales or if you have Professional Services to contact them. 

-Melissa 

Hi f5Subrun,

BTA > Best Bundle
BR > Better Bundle

You can view the license features in the link.
https://www.f5.com/pdf/licensing/good-better-best-licensing-overview.pdf

Supported BIG-IP release versions
https://my.f5.com/manage/s/article/K15643

End of Sale announcement for BIG-IP Virtual Edition V18 licenses
https://my.f5.com/manage/s/article/K000152002