"I get your drift" is used during everyday conversation to convey the meaning that you understand what is being said and there is really no need to elaborate too much.
When using the everyday phrase "I get your drift", the matter being talked about could be a person, a place, a physical item or an activity.
1. When the architect started telling his client about the benefits of using granite blocks rather than marble, the client impatiently said "I get your drift. Let's now talk about the garden area on the terrace".
2. Sharda was chattering on and on about the many attractions of Kemmangundi till her friend interrupted to say, "I get your drift. Can you tell me first how to reach Kemmangundi?"
3. It was only when the Professor started showing diagrams that the students got the drift of things and understood the topic on velocity.