Registration adds specific things worth understanding rather than assuming. In the United States, registering a copyright before an infringement, or promptly after publication, is what makes statutory damages and attorney fees available. Without registration you can still enforce, and the economics frequently do not justify it, which means an unregistered work is protected in principle and expensive to defend in practice. For a business whose material is central to what it sells, that distinction matters.

Trademark protects the name and the mark rather than the content, and it operates separately. Using a mark in commerce creates rights in your area, and federal registration extends and strengthens them. These are different systems with different processes, and confusing them is common enough that it is worth stating: registering a business name with your state does not create trademark rights, and owning a domain creates none at all.

The most common real loss for small businesses is not theft by a competitor. It is not owning what they paid for. Work produced by a contractor belongs to the contractor absent a written assignment, which means the logo, the site, and the photographs you commissioned may not be yours to modify or license. That is entirely preventable with one clause and entirely irreversible once the relationship has ended badly.

Keep evidence as you go, since it costs nothing. Dated files, the original source documents, the email in which work was delivered, and a record of when things were first published. If a dispute ever arises, the question will be who created it and when, and a business that can answer immediately is in a different position from one reconstructing from memory.

Decide in advance what you would actually do about infringement, because the answer is frequently nothing and knowing that changes your prevention. Watermarking images, publishing lower resolution versions, and putting terms on your site are cheap and reduce casual copying. Pursuing somebody through the courts is neither cheap nor fast, and for most first year businesses a takedown request to the platform hosting the copy achieves more than any legal action would.