Advantages of Task-based language teaching

Task-based language teaching (TBLT) is a widely used approach today. Its acceptance is mainly due to the use of authentic materials in meaningful communicative contexts to help develop the learners' interlanguage using a focus on meaning rather than linguistic form. Some of its advantages are:

1. TBLT provides a context for negotiation and comprehension of meaning.
2. TBLT provides opportunities for uptake of corrective feedback.
3. TBLT provides opportunities for incorporation of pre-modified input.
4. TBLT provudes opportunities for noticing the gap between input and output, therefore supports metalinguistic reflection.
5. Tasks used can be designed to match the developmental stage of the learners.
6. Tasks are flexible, and any language activity can be a task. 
7. Any resource, including the L1 of the learner can be used in TBLT classrooms. 
8. Assessment is integrated into learning in task-based classrooms. Therefore, teachers get to understand where their students are by noting their task performance. 

There are more advantages. You may add them below in the comments box.

References:

Robinson, (2011). Second language task complexity: Researching the cognition hypothesis of language learning and performance. Philadelphia: John Benjamins Publishing Company.

Skehan, P. (2008). A Cognitive Approach to Language Learning. Oxford: Oxford University Press.