By itself, your trust document means nothing; only when you take title to your assets as trustee(s) of your trust does it become a valid legal tool.
Funding means taking the required steps to change the ownership of the assets you own from you as an individual, to you as trustee of your trust. For some types of assets, such as life insurance and IRAs, you’ll change the beneficiary designations.
To fund your Revocable Trust, you will need to use the appropriate forms that your institution provides or use the ones available on this program. https://www.musthavedocuments.com/fund-trust 
Can a business account be added?
Yes, (information can be found in the funding part of the program) If it’s a sole proprietor then we assign the biz and accounts to the trust by an assignment form in the kit. If it’s a corporation or LLC then you reissue stock or the LLC interest in the name of the trust and then the account has to be changed to match.