A data segment is a subgroup of your data, according to a filter on one (or more) features.
For example, let’s consider a group of people, in which 20% enjoy eating chips. If we look at a sub-group (data-segment) of the entire group, to whom the filter “people who enjoy ice cream” applies, we might discover that 60% of the people in that sub-group enjoy chips.
This example shows us that examining your data using various data segments might change your perspective, and lead to new insights.
