Here are a few thoughts for you:
updated in every field.
Every field? Doctors don't need to know the latest technology used for auto repair and auto technicians really don't need to know how to do brain surgery. This statement is over broad.
One of the advantage of keeping oneself updated is that, No body can misguide you.
One of the advantage
s . Advantages needs to be plural.
nobody No need to capitalize it, but it does need to be one word. When you write it as two words, it looks like the person does not have a body.
If a person is aware about the particular subject than he can present his view if someone is trying to mislead him.
Put a comma after the word "subject." "Than" should be "then."
For instance, If a person is purchasing a home and he has information about the prices, than he can bargain about the price instead of just finalizing the deal with no arguments.
"If" does not need a capital. Again, than should be then.
Therefore, a person can make himself protected with other's wrong intention.
Usually in English, we would say "protect himself" instead of "make himself protected." It flows much better. "Others" here is plural so you would need to write in, "others' wrong intentions."
With his knowledge a person can take the new decision by keeping him aware about the positive and negative aspects of particular decision.
You need a comma after the word "knowledge." There are certain words (when, as, if, while, before, because, on) that will let you know that the possibility of needing a comma is high. Here is a web quiz for you to practice this concept a little more:
newsroom101.com/NR_exercises/grammar/comma/introductorycomma 01.htm
This make him confident about the action he has to performed.
This make
s him ... either use "he has to perform" or "has performed."
make his decision accordingly
makes
Knowledge helps the person to think rationally and make him aware
makes
If a advertising company make itself
makes (and "if" should be lowercase)
Thus it make him
makes
In conclusion I must say if a person is updated then with his knowledge make him confident to take risk and easily adaptation in the field if competition. And also make him able to think rationally before taking any decision.
Comma after "conclusion." Comma after the word "updated." Makes. Makes.
This is well organized and thought out. The good news is that most of your mistakes are ones that you make repeatedly. Why is that good news? Because once you figure those things out, your writing will be almost error free! Work on learning about commas after introductory clauses and verb agreement. He makes, she makes, the company makes, it makes, you make, I make, we make, she will make, he will make, we will make ...