Google has been fined a record US$5 billion for violating antitrust laws in relation to their Android operating system.
The European Commission said the firm had used the mobile operating system to illegally cement its dominant position in search.
The firm's parent company Alphabet has been given 90 days to change its business practices or face further penalties of up to five per cent of its average global daily turnover.
It has said it plans to appeal.
However, it could easily afford the fine if required - its cash reserves totalled almost US$103 billion at the end of March.