Somewhere in a downloads folder, your logo is a PNG. Maybe a good PNG. Doesn't matter. If that PNG is the master file of your brand, you are one billboard, one embroidered polo, or one retina display away from finding out why designers keep saying the word "vector" at you.
The difference in one paragraph
A raster file (PNG, JPG, WebP) stores your logo as a grid of colored pixels. Zoom in and the grid shows. A vector file (SVG, EPS, PDF) stores your logo as math: points, curves, and fills. Zoom in forever and the edges stay razor sharp, because the math re-draws at any size. Raster is a photograph of your logo. Vector is the logo itself.
Where the PNG bill comes due
- Print. A 1000-pixel PNG looks fine on screen and turns to soup on a trade show banner. Print vendors will ask for vector art on day one.
- Favicons. Shrinking a detailed raster mark to 16 pixels produces gray mush. Scalable marks are designed to survive it.
- Merch and signage. Embroidery machines, vinyl cutters, and laser engravers read paths, not pixels. No vector file, no hat.
- Recoloring. Need the white version for a dark background? With vectors it is a one-line change. With a flattened PNG it is surgery.
"Can't I just convert it?"
Auto-tracing a raster logo into a vector is like scanning a fax of a photocopy. The tracer guesses where your curves were, and it guesses badly: lumpy circles, wobbly stems, corners that were once sharp. A real conversion means redrawing the mark from scratch, which is why it costs real money. The cheaper fix is to never accept a logo that was not born vector.
The checklist
Open your brand folder and check: do you have an SVG or EPS of your logo, in full color, single color, and reversed (white) versions? If yes, you are fine, carry on. If all you can find are PNGs pulled from your own website, that is not a brand asset library. That is a screenshot collection, and it will fail you at the exact moment your brand gets a chance to be seen somewhere bigger.