Logo designs can range from the simplicity of a text based to the more decorative style logo. In most cases you already can visualise what you want your logo to look like, all you need is someone to create it. Generally the logo being the first thing your customer will see, it should look professional.
Graphic design is the art of creative and visual content to communicate your message. This can be in the form of posters, website banners, social media posts, etc. Applying layout techniques, typography and pictures to meet your specific needs to optimise your customer experience.