Seeds higher than 4294967296 and negative seeds won’t work in Bedrock. However, you can sometimes switch to the Bedrock version using seeds up to 2147483649 and then by subtracting or adding 4294967296 to Java seeds higher than 2147483649. There’s no guarantee they will work with other versions of the game. Note: These seeds are designed to work with the Minecraft Java edition. The result is a growing collection of very useful or interesting seeds that are perfect for players who want something new - but not entirely random - to explore. The cool part is that if you find a world you really like, you can copy, save, and share the seed.
This seed is the core code that builds the world and decides your spawn point in it. When you spawn into a Minecraft world, it uses a seed number to generate … well, everything.