What's COUNT in Kibana Discovery tab?

Hi!
I am pretty new to ELK stack and was exploring the application for my project.
I uploaded a CSV file using logstash and went straight to the discovery tab in Kibana, where a Histogram was already plotted, can someone please explain me what exactly is COUNT filed on the y-axis of the histogram.
Thanks for taking time.

hi @Prabhav

the count is the number of documents within each time-range.

Hey @thomasneirynck thanks so much for getting back.
Does the plotted histogram for count display the dumped response in a serialized manner?
As in the document at the first position in the CSV file is plotted first in the graph?