# Environment variables [Environment variables](https://app.datamin.io/env-variables) allow you to set variables in one place and reuse them in tasks of pipelines and metrics as **ENV\_variable\_name**.

For example, if you have a KPI threshold equal to **100**, you can set its variable as **key="KPI\_THRESHOLD"** and **value=100** here and reuse it everywhere else as **ENV\_KPI\_THRESHOLD**.

Using environment variables in API Calls

Using environment variables in Conditions or Aggregators

Then if you want to make it **110** instead of **100**, you can do it in one place, instead of changing all of your workflows and metrics. For more information take a look at our video tutorial: {% embed url="" %}