Flexible plastic packaging is important for several reasons:

1- Convenience: Flexible plastic packaging is lightweight, easy to handle, and be shaped to fit a variety product. This makes it convenient for both manufacturers and consumers. 

2- Cost effectiveness: Flexible plastic packaging is typically less expensive to produce than other types of packaging, such as glass, metal or paper packaging.

3- Product protection: Flexible plastic packaging can be designed to protect products from damage, contamination, and spoilage. For example, vacuum sealed bags can help to extend the shelf life of food products.

4- Sustainability: Flexible plastic packaging can be designed to be more sustainable than other types of packaging. For example, most flexible plastics are made from recycled material and reused several times.

Overall, flexible plastic packaging is a popular choice for many products because it is convenient, cost effective, and able to protect and preserve the quality of the products it contains.