Here's why:
* Adverbs modify verbs, adjectives, or other adverbs. They tell us *how*, *when*, *where*, or *to what extent* something happens.
* In this case, "awkwardly" describes *how* someone is doing something.
For example:
* "He walked awkwardly across the stage." (modifies the verb "walked")
* "She looked awkwardly at the stranger." (modifies the verb "looked")
* "He was awkwardly dressed for the occasion." (modifies the adjective "dressed")