CSV is a delimited data format that has fields/columns separated by the comma character and records/rows terminated by newlines. A CSV file does not require a specific character encoding, byte order, or line terminator format (some software do not support all line-end variations).

In order to get a .csv file into R, you can use read.csv, and as the only argument, put the path to the file you want to read in within quotation marks. Ideally, the file should be close to, if not in the same folder as, this script. That way you only need to type a relative path.