Branding is what identifies your unique product, service or company as your own and differentiates you from your competitors. Your brand is your promise to your customers. It tells people what they can expect from your products or services. It is how people perceive you.
A logo is not your brand, however it can be the foundation of your brand. Your website, packaging, promotional materials and communication with clients and customers all communicate your unique brand.
Keeping your brand consistent and strong will bring added value to your company over time.