I moved this thread from Grammar Usage forum to Writing Feedback forum as it is the most appropriate forum for this essay. Please note that point when you open your new threads. Also, include the purpose of your writing in the title so that others can provide you with more meaningful comments.
In present days, thepeople is get gained some knowledge from books and experience of life that is definitive treotical and practical, learning from both is essential.
This sentence has many issues. First, the grammar errors. Then, the clarity of your ideas. Do not write complex sentence with many advance words if they destroy the clarity of your ideas. What is more important is that the reader should be able to understand what you say easily.
"people is" - this is wrong because "people" is plural word meaning a collection of men or women.