So you're designing a little board in KiCad and you want to add an LPC1768 to it to do some processing. You need to get a schematic representation and a physical footprint of the part into your CAD software. You could spend an hour carefully reading the datasheet and recreating all of the pins and landing pads, but this is the 21st century! You look at the manufacturer's website, SparkFun's part library, google a bit, and you can't find premade files for the part. So you go on InstaPart and pay $29 and someone at SnapEDA does the work for you and then releases the files for free. Now they're listed on the SnapEDA database for anyone to use, and you know that they're going to be correct.