An International shipping is a service that used to describe a parcel delivery or group of parcel deliveries in which the parcel is taken from one country & delivered to an address in another.
Many different online sellers will offer international shipping as a means to attract an audience that goes beyond the limits of the country they’re selling in. Because of the number of resources involved to get a parcel from one country to another, international shipping is typically a little more expensive than domestic deliveries.
There is an advanced version, called Expedited International Shipping, of this service that moves more quickly than an economy service. Whereas an economy service might take 5–10 days to be delivered from one country to another, expedited international shipping takes just 1–3 days on average. As an option to buyers, this service is a real advantage for a lot of businesses.

International shipping directly with the merchant is way too costly. More often than not, the shipping costs are even higher than the item cost which is totally not worth it.
This is why I recommend to use a freight forwarder or reshipping service when shipping packages internationally. You have the freedom to make additional changes so you can save more on shipping by availing the services they offer.
They can help combine multiple orders from multiple merchants, thereby reducing the shipping weight, cost and the number of deliveries to your home address. In other words, it's the more affordable alternative. With this, you may want to use comGateway - this is my go to freight forwarding company and is very reliable. Plus, their customer service is polite to assist you.