This survey looks at two main ways computers understand languages: Top Down and Bottom up parsing. Translating means splitting a mess of symbols (like words in a sentence or code in a program) with the help of grammar regulations. Top-down parsing starts from the main part of the tree and goes to the details, while bottom-up parsing starts from the details and builds up to the main part. Though each method has its pros and cons, it is good to know what they are in order to produce a good parser. This survey captures just the initial ideas, strategies, and instances where we can use these parsing methods. This study allows people who make software to compare the effectiveness of different ways of understanding languages, their complexity, and the best time to use them.