Is this following sentence correct with grammar? If not how should it look

By adding more options for the customers, the staff can then be responsible for promoting those new items and advertisements can be made to help draw customers back to the restaurant.

The best way of correcting this is to make two sentences. Omit "and" and begin the second sentence with "Advertisements."

The sentence you provided is grammatically correct. It effectively communicates the idea that by increasing the range of choices available to customers, the staff can take on the responsibility of promoting these new offerings, while advertisements can be created to attract customers back to the restaurant.

If you would like to understand how to determine if a sentence is grammatically correct or make corrections, there are a few steps you can follow:

1. Identify the subject and verb: In this sentence, the subject is "the staff" and the verb is "can be responsible."

2. Check for subject-verb agreement: The subject and verb should agree in number. In this case, both the subject ("the staff") and the verb ("can be responsible") are singular, which is grammatically correct.

3. Verify the correct use of modifiers: In this sentence, the phrase "By adding more options for the customers" serves as an introductory phrase and provides additional information about the staff's actions. It is correctly separated from the rest of the sentence by a comma.

4. Look for parallel structure: When there are multiple actions or items listed in a sentence, they should be in parallel structure. In this sentence, the two actions mentioned are "the staff can be responsible" and "advertisements can be made." They are parallel in structure, making the sentence grammatically sound.

Overall, the sentence is well-constructed and does not require any changes.