Visual identity
Visual identity is the set of seen elements a brand uses to be recognised: logo and its variants, colour palette, typefaces, layout conventions, photographic treatment, and the rules governing how they combine. It is one layer of a brand rather than the whole, and it is defined by its rules as much as by its assets.
Visual identity is not Logo.
A logo is one asset inside a visual identity, and usually the least load-bearing one in a feed, where it appears small or not at all. Recognition while scrolling comes mostly from colour, layout and type, which is why a brand with a strong logo and no system still reads as a stranger from one post to the next.
In practice
A visual identity does one job: it makes work recognisable before it is read. In a feed that recognition happens in well under a second, peripherally, which is why the elements carrying it are the coarse ones. Colour first, then layout shape, then type. Fine detail that rewards close inspection is still worth doing, but it is not what earns recognition at thumbnail size, and identities are routinely judged on the things nobody sees at speed.
A complete visual identity is more than a folder of assets. It is assets plus rules: which logo variant sits on which background, what minimum clear space it needs, which typeface at which weight carries a heading against body text, how much of the palette may appear in one piece, what a photograph of a person should look like. The rules are the part that gets skipped when time is short, and they are also the part that determines whether several people, or several tools, produce work that belongs together.
The common misunderstanding is that a visual identity is a design deliverable that gets finished. It is a system that gets used, and its quality is measured entirely by the work coming out of it rather than by the presentation it arrived in. A beautiful identity nobody can apply under deadline pressure is worth less than a plain one sitting a click away from the canvas. This is why identities decay quietly: each shortcut introduces a variant, and nobody cleans up variants they do not know exist.
In practice, keep the identity small enough to hold in your head and specific enough to check. Two typefaces beat five. One primary, one accent and a controlled neutral range beats a rainbow with no hierarchy, because a palette without rules about proportion is only a list of colours. Write down the contrast floor for text on each background rather than leaving it to the eye, since that is the rule most often broken by people acting in good faith. Then audit against reality: put a month of output side by side and count the variants. Generating from a stored identity, as Repic does when it builds carousels, posts and stories from one profile, removes the moment where somebody picks a colour from memory, but the discipline is the same either way.