Your dryer needs a good filter to catch the lint. Without one, that lint will blow all over, coating your dryer exhaust vent, caking up, until your dryer can't vent anymore. With enough lint in the way, you could even get a dryer lint fire, which is no good at all. Save yourself by ensuring your filter is in good shape. Make sure to clean the filter regularly (after every load is good), and dispose of the lint properly.
Please note the following important information about this product from Think Crucial: (i) it is a generic replacement, NOT a LG® Original Equipment Manufacturer (OEM) product; (ii) because it is not a LG® OEM product, it is not covered by any LG® guarantee or warranty; (iii) use of this generic replacement may violate or void LG's® guarantee or warranty - it is entirely your responsibility to check, and entirely your risk if you decide to use this product; (iv) we do not guarantee or warrant that this generic replacement is compatible with any product from LG® or any other provider. Please check your manufacturer's warranty with regard to the use of non-OEM parts. Think Crucial provides no warranty or guarantee with regard to the product or its compatibility with your LG® product. The LG® brand and all LG® trademarks belong to LG® or its affiliates, and are used here only to explain the compatibility features of the generic replacement product.