Are you asking what "parse" means? Or are you complaining in general that "beginner" documentation contains technical terms you're not familiar with?
If the latter, could you provide a pointer to the offending text?
If the former, "parse" means approximately "derive meaning from a set of symbols." Humans "parse" language all the time, figuring out what is meant by a printed (or spoken) phrase; language and linguistics majors get more formal, so they can tell you why a phrase like "time flies like an arrow; fruit flies like a banana" is funny. Computer programs lack "intelligence", so they obey pretty strict rules and have a very limited set of symbols that they can parse, which is why computer languages look so weird.