It is easy to find any image, font or logo online in seconds. That does not mean you are allowed to use it. Using other people's work without permission can embarrass your client and damage your reputation. Employers trust designers who know the basic rules.
Copyright in simple terms
Copyright protects creative work such as photos, illustrations, designs and fonts. In Ghana, as in most countries, copyright usually exists as soon as an original work is created in a form people can see; it does not need to be registered. Registering with the Copyright Office is voluntary and gives you a record that can help prove ownership. So assume an image or design online belongs to someone unless its licence clearly says how you may use it.
Images
Safer sources are your own photos, photos the client owns, free stock libraries with a clear licence, and Creative Commons images used according to their terms. Creative Commons licences have short codes: BY means you must give credit, NC means non commercial use only, and ND means no changes. An NC image is not suitable for a business advert.
Fonts
Fonts are software and come with licences too. Fonts from libraries such as Google Fonts are released under open licences, such as the SIL Open Font License, that allow commercial use. Many fonts on free download sites are "personal use only" or demos. Check before using a font for a paying client.
Logos and brands
Never copy another business's logo or make one that looks confusingly similar. Logos can be protected as trademarks, and in Ghana trademarks are registered with the Registrar General's Department. Companies register with a different office, the Office of the Registrar of Companies. A logo that copies a famous brand can force your client to rebrand, wasting their money.