The phrase ‘Can I get’ can be used in a couple different ways. You can use it to ask a question.
Here are some examples:
“Can I get a cup of water?”
“Can I get a dog?”
“Can I get lunch?”
“Can I get sugar in my coffee?”
“Can I get popcorn at the movie?“
You can also use it when offering to help someone or do something for them.
Here are some examples:
“Can I get you another drink?”
“Can I help you move that?”
“Can I recommend a good place to eat?”
“Can I take you home?”
“Can I help you finish your project?“