A trusted SEO agency offers complete and specialized keyword research as a part of its SEO services and operates. Most companies include keyword research, but beware of any company that provides you with the key word for your work. Thus, you don’t need to have any hassle with the keywords and other stuff.
Although they may ask for your opinion, but the keywords used are based on their research, analysis and competitive field, which states to them. Remember, they are for SEO companies– not you! Your keyword “guessing” is not skillful and a great SEO agency will do a thorough research of your keyword before advising them.