After a series of appeals, the court announced that Google was found guilty of infringing Oracle's patents, and that the 37 APIs did indeed belong to Oracle.
Or in simpler words:
The operating system of most smart phones around the globe is the Android system, which is controlled (freely distributed) by Google. The programming language used to write the programs that will run on Android is called JAVA, a language developed by a subsidiary of Oracle.
In every programming language, there are parts called APIs - Application programming interfaces, which are essentially complete pieces of software that are prepared in advance. So that the programmer does not have to build the entire software structure himself.
Oracle owns 37 such pieces of software, the court ruled in a ruling that could change the face of global cellular. According to the ruling, Oracle is suing Google for about $1 billion, and it is also possible that Oracle could sue the other users of the code pieces, i.e. the developers, for illegal use, which would result in very high costs due to the role of lawyers in building future software, and in using existing software.