Logistics is a wide topic. What specifically do you have a question about regarding logistics?

Logistics is all about moving things from one place to another in the fastest, safest way possible. It starts with finding where things are stored, like a warehouse, and deciding how to pack them up carefully. Then, there's the choice of transport—maybe by truck, plane, ship, or train, depending on where it’s going and how soon it needs to arrive. Planning the route is important, like picking the best path to avoid traffic or delays, so nothing gets lost. Once on its way, logistics allows people to track the package, seeing where it is and when it’ll arrive. If something goes wrong, like a truck breaking down, there are people who step in to sort it out. When packages go to different countries, they have to pass through customs, like security at an airport, with the right paperwork to avoid delays. At last, the package arrives where it’s needed, whether at a shop or someone's home. Keeping everything safe and arriving on time, so people are happy with what they ordered. Good logistics saves time and money, helping everyone involved get what they need more easily.
Hope it helps.

Logistics is the process of effectively and efficiently managing the flow of goods or services from the point of production to the point of consumption. Logistics is a crucial component of supply chain management.
Logistics encompasses the following areas:

Materials management: The storage, inventory control, and distribution of raw materials, semi-finished, and finished products.
Production logistics: The planning and management of the movement of parts and components within a factory.
Distribution logistics: The timely and efficient delivery of products to end-users or retailers.
Reverse logistics: The collection, recycling, or disposal of products.
Transportation management: The coordination of different modes of transport, such as road, rail, sea, and air.
Warehousing and handling: The effective storage and handling of products.

Logistics plays a critical role at every stage of the supply chain. Efficient logistics management can provide crucial outcomes such as cost savings, speed, flexibility, and customer satisfaction.

On top what was already answered, stands for me the strategic view of logistics from end to end: From supplier, through own production until customer delivery. Both information logistics (ordering, forecasting) and physical logistics (warehouse, transport, packaging, foreign trade) must always have this bird view in their mind.
That explains the importance of logistics in a company organization: functions that are often valued as much more important such as purchasing, sales, production, etc. only focus on a portion of this end-to-end supply chain.
Only logistics brings it all together so products and services can flow.