I am new to kibana and i am trying to transfer my data from aws service to kibana.
Once I receive the data from AWS and create a index patter i can see two fields created for every 1 filed of my original data. For example my original data is having a field "activity" and in my discover tab I can see only the field "activity"but in my index patter I have "activity" and "activity.keyword" .
Why .keyword is created for my fields ? and what is the use of them and how to avoid them ?