Interaction history in building products for consumers is like keeping a diary of all the times a person has used or talked about a product. 

Imagine you have a favourite toy that you play with every day. Now, your parents could magically know when you played with it, how long, and which parts of the toy you liked the most if you ever told your friends about it. This information is what we call ‘interaction history.’ It is a record of all the ways you’ve used or interacted with the toy. 

Companies use special computer programs to collect and store this information. These programs help them see patterns in how lots of different people use their products.