Here is a visual rundown of what happens in the Parsha
The Jews on their path out of Egypt did not take the direct route to Israel which would have been to travel up the coast of the Mediterranean. Instead they took a route south until they reached the Sea of Reeds, at which point the Egyptians caught up to them, leading to God splitting the Sea (Note that the Jews did not cross the Sea. They emerged on the same side that they entered).
the Parsha records a few locations the Jews visited following the Splitting of the Sea. Here is a summary of those stops.