Since you may work closely with your client's employees and their other contractors, your client may be concerned about their people taking a job opportunity with you. For example, if the work you're doing for your client is sensitive or the client has people working for them that are in the same industry as you, they could be worried about losing a key person on their team when they really need them. So, your client may ask you to promise to not directly offer a job or work to their people.
This kind of promise is called a "non-solicitation" clause. It's a fairly common ask by clients. If you would like to include a non-solicitation clause, we can put one in the contract for you.
Your client may ask you to promise not to work for their competition. For example, if your client is hiring you to develop a marketing plan they may not want you to also work for their competitor because it could be a conflict of interest. This kind of promise is called a "non-competition" clause. They are hard to enforce and a court will not uphold the promise if it goes on for too long.
You're likely not in favour of adding a non-competition clause because you want to be free to work for as many clients as you can. But if you would like to include a non-competition clause because the work you're doing is very sensitive or you want to give it to win the client's work, we can include one for you.