PLA (polylactic acid) is a popular choice for 3D printing filament due to its many benefits, including the following:

1. PLA is a biodegradable and environmentally friendly material, made from renewable resources such as cornstarch or sugarcane. This makes it a more sustainable choice compared to petroleum-based filaments like ABS (acrylonitrile-butadiene-styrene).

2. PLA has low shrinkage and warping, which means that printed parts have a high dimensional accuracy and stability. This makes it a good choice for printing objects with precise dimensions or tight tolerances.

3. PLA has a low melting point and does not require a heated bed to print, which makes it easier to use on entry-level or budget-friendly 3D printers that may not have a heated bed.

4. PLA has a smooth and glossy finish, which makes it suitable for printing objects that will be visible and on display.

5. PLA is strong and has good rigidity, which makes it suitable for printing functional parts that need to be durable and able to withstand stress.

Overall, PLA is a great choice for 3D printing due to its combination of environmental sustainability, ease of use, and high-quality finished prints. It is a versatile and reliable material that is well-suited for a wide range of applications, from prototyping to end-use parts.