This video will take you through the entire process of building a script for visualizing and mapping floods using Sentinel1 dataset in Google Earth Engine for Golpara district of Assam.
Google Earth Engine is a geospatial processing service. With Earth Engine, you can perform geospatial processing at scale, powered by Google Cloud Platform. The purpose of Earth Engine is to:
Provide an interactive platform for geospatial algorithm development at scale
Enable highimpact, datadriven science
Make substantive progress on global challenges that involve large geospatial datasets

Also, In the later part of the video it is shown, how to create earth engine app. Apps published from Earth Engine are accessible from the applicationspecific URL generated at time of publishing. No Earth Engine account is required to view or interact with a published App.

Resources:
Earth Engine script used in video https://code.earthengine.google.com/c...
Earth Engine App cretaed in the video: https://opengeolab4.users.earthengine...
Earth engine Link https://earthengine.google.com/