What do you mean by parsing? What are the applications of parse tree?

Parsing: The CFG is an essential concept for the implementation of compilers and other programming language process. Tools such as YACC take a CFG as input and produce a parser, the complement of a compiler that deduces the program being completed.

The applications of parse tree:

(i) A parse tree or derivation tree or concrete syntax tree is an ordered, rooted tree that represents the syntactic structure of a string according to some context-free-grammar.

(ii) A parse tree shows us clearly how the symbols of a terminal string are grouped into substrings.

(iii) To build language applications without entangling the application and the grammar the key is to have the parser create a parse tree.