Having a lot of confidence in you leads to your self improvement. For improving your self confidence, you should know what is self-confidence.
Self confidence is assurance: freedom from doubt; belief in yourself and your abilities; An individual’s belief that they can successfully perform a desired behaviour.The state of being self-confident is a measure of one's belief in one's own abilities

How to build self-confidence.

You want to be confident and feel confident, but what if you're starting with little or no confidence? How do you improve your self confidence.? True self-confidence isn't an overnight acquisition. It takes dedication to realize you are a good human being that is worthy of respect and love. It is a planned step by step process. It involves identification, corrections and achieving your goal.

Identify your insecurities. It can be anything, acne, obesity, fear, shyness. Whatever it is find it out and write down on a piece of paper.
Don't feel inferior. Don't walk around with a thought in your mind that others are more qualified or better than you.
Talk about each issue with your friends and relatives. You cannot move ahead until you resolve them.
No one is perfect. Life has its ups and downs. Even persons who are perfect have their drawbacks.
Learn to identify your successes. Everyone is perfect in some area. Identify in which area you are perfect. Focus on them and be proud of yourself for possessing those qualities.

At the root of insecurity and lack of confidence is a feeling of not having enough of something, whether it's emotional validation, good luck, money, etc. By acknowledging and appreciating what you do have, you can combat the feeling of being incomplete and unsatisfied. Finding that inner peace will do wonders for your confidence

Avoid self-pity, or the pity and sympathy of others. Never allow others to make you feel inferior--they can only do so if you let them. If you continue to loathe and belittle yourself, others are going to do and believe likewise. Instead, speak positively about yourself, about your future, and about your progress. Do not be afraid to project your strengths and qualities to others. By doing so, you reinforce those ideas in your mind and encourage your growth in a positive direction.

Accept compliments gracefully. Don't roll your eyes and say, "Yeah, right," or shrug it off. Take it to heart and respond positively by saying a "Thank you", give a smile it works well

Feeling happier with yourself will work wonders in building your confidence. Look in the mirror and smile. Studies surrounding what's called the "facial feedback theory" suggest that the expressions on your face can actually encourage your brain to register certain emotions. So by looking in the mirror and smiling every day, you might feel happier with yourself and more confident in the long run.

Similarly, on the same lines of smiling to make yourself feel happy, acting confident might actually make you believe it. Pretend you're a completely confident version of you; go through the motions and see how you feel.

When you know you're kind to the people around you, and are making a positive difference in other people's lives (even if it's just being kinder to the person who serves you coffee in the morning), you'll know that you are a positive force in the world--which will boost your self confidence. Go volunteer twice a month at an elementary school. Bake something for your neighbor for no reason. Confidence that you have earned is the most long-lasting.