The phrase “more or less” is a common expression that has two main uses.
First, it can be used to express the meaning approximately. In this case, the phrase more or less comes at the end of the statement. For example: We are expecting 50 guests, more or less.
Second, more or less can be used to mean something is basically true, or true to some degree. In this case, more or less usually comes in the middle of a statement. For example: The project was more or less completed.