A simple example would be planning to buy a house or a car. Rather than having to decide between buying the item right now with all cash or never having it, you can plan to buy it over several years by making payments. Or, you might combine this plan with the plan to buy a smaller house and add rooms later as they could be afforded. By planning you can thus accomplish things that might otherwise look impossible. We all recognize that some decisions are more important than others, whether in their immediate impact or long term significance.
Strategic decisions are the highest level.
Here a decision concerns general direction, long term goals, philosophies and values. Whether to produce a low priced product and gain market share or produce a high priced product for a niche market would be a strategic decision. Tactical decisions support strategic decisions. They tend to be medium range, medium significance, with moderate consequences. Or if your company decided to produce a low priced product, a tactical decision might be to build a new factory to produce them at a low manufacturing cost.