Okay kiddo, imagine building a big, tall tower made of blocks. You have a lot of different blocks to choose from and you have to decide which ones to use and where to put them. This is called an architectural decision.
Just like building a tower, when people build big things like buildings or software programs they have to make a lot of decisions about how things will be put together and what materials will be used. These decisions are called architectural decisions.
Architectural decisions are really important because they determine how well the thing being built will work and how easy it will be to change or fix it later on. Just like if you use weak blocks, your tower might fall over and be hard to fix, if you make bad architectural decisions, your building or software program might not work well or be hard to fix.
So, when people make architectural decisions, they have to think really carefully about things like what materials to use, how to organize them, and what the overall design should be. They also have to think about who will be using the thing being built and what they will need it to do.
Making good architectural decisions can be really hard, but it's really important to get it right so that buildings and software programs can be as useful and easy to work with as possible.