Finally is a programming keyword that can be used to indicate the end of a loop or an exception handler. It is generally considered safe to use, as it helps ensure code execution runs smoothly and efficiently by allowing for better control over when certain lines of code are executed. However, there may be some cases where using finally could cause unexpected results due to its unpredictable nature - such as if the program unexpectedly exits while inside the finally block or if another error occurs within it which causes further issues in other parts of your program's logic. Therefore, care should always be taken when utilizing this keyword and you should thoroughly test any programs containing finally before releasing them into production environments.