When you input a seed during world creation in Minecraft BE, you will spawn in your desired location decided by the seed code. This will help you to have an initial spawn point near any structure like a village, ravine, the dungeon, etc, of your choice. Minecraft Bedrock Seeds allow you to create a pre-determined world to build in.
The Minecraft Bedrock Edition (BE), which is also known as the Pocket Edition (PE), is different from the traditional Minecraft game, so the Seeds for it are also different. The decision to where you’ll start is random but you can control it with the Minecraft Seeds. Minecraft drops you in a completely new and unique block world every time you start a new save.