Used to suggest a possible purpose or function for something, without being certain.
“It could be used for opening jars, though the handle looks too fragile for that.”
“Honestly, it could be used for almost anything, from cooking to cleaning.”
Task 8 usually requires you to guess the function of an unfamiliar object, and this phrase is the most direct way to introduce a speculative purpose. Use it more than once with different guesses, as in 'it could be used for cooking, or maybe for gardening,' since this kind of hedging language is exactly what the task is designed to test.
Synonyms: might be used for, could serve as, may be intended for