The moment garage shelving made sense to me was standing in front of a wall of paint cans, half empty rollers, and a box of Christmas lights from three houses ago, trying to find the one wrench I needed before it got dark. A single run of shelving at eye level, deep enough for bins, cheap enough that I didn't baby it, and suddenly the whole wall stopped being a pile and started being storage. That's the whole pitch. It's not pretty. It just has to hold what you own and let you see it.
Where it goes wrong is when people treat a garage shelf like a bookcase and put it somewhere damp or right against an uninsulated wall, because particleboard and moisture do not get along, it swells at the edges and the shelf sags in the middle within a year. Keep it off concrete floors too, even an inch of clearance with plastic feet saves you from a slow wick of moisture turning the bottom shelf to mush. If you've got nothing in the garage yet, start with a basic wire or coated steel unit, the kind with adjustable shelves on clips, because it's light enough to move alone, it doesn't care about humidity the way wood does, and you can see at a glance what's on it instead of guessing what's behind a solid panel. Check the weight rating before you load it, not after, most of the cheap ones are fine for paint cans and bins but will bow under a box of tile or a car battery. Give the frame a shake in the store or right after you build it. If the whole thing racks sideways, the bracing is wrong and no amount of careful loading will fix that later.
In an ordinary garage, a steel shelf like this sits well next to a pegboard wall for tools, a rolling tool chest, and whatever bins you already own, it doesn't need to match anything because nobody is styling a garage, they're trying to find the ladder. If you do want something sturdier, a solid wood or thick plywood unit with real bolted joints is worth the extra weight for heavier tools, but check the shelf supports before you buy, if they're just resting in slots rather than bolted or doweled through, that's your weak point, not the wood itself.
Measure the depth of your car doors when they're open before you buy anything deep, because eighteen inches of shelf can turn a two car garage into a one car garage fast.