In writing, sensory language is a way for a writer to help the reader see or connect with an image, description, action, or scene. Sensory language is language that connects to the five senses (sight, sound, smell, taste, touch) to create an image or description.
He basically gives him his resume, or all the heroic things he has done in the past, such as: he has never been defeated, he has saved many people, he talks about how he lost the swimming match to his friend Brecca because he stopped to help him against sea monsters which attacked him, etc.
These boasts are here for Beowulf to show to Lord Hrothgar that he is worthy of defending his kingdom against the monster Grendel.
For example, it means everyone contributes, so when you go to dinner with a group of people, you would all pay for your own bill.
