Assigning a business to a contact is a great way to keep your contacts up to date with who they are affiliated with.
From your Contacts page, click on the name of the contact you want to assign the business to.
The Business Details section can be found on the left side below the Personal Dates section. Click on Apply Business to open your choices. Select the one you need and it will automatically update the business information for that contact.
Pro Tip!
If you need to change the business information for all the contacts within a specific business, save time by updating it under the Filters section rather than updating each individual contact. This article goes over editing a business: Adding, Editing, and Deleting Contact Businesses.