Question

How can I improve my memory power and concentration?

Answer 1

You can improve your memory power and concentration by getting plenty of sleep, eating brain healthy foods, getting plenty of physical exercise and playing games that involve math and problem solving.

There's plenty of online games that you can play to help improve your memory and brain power as well as concentration.

Also doing activities offline that involve using your brain for thinking and problem solving such as hobbies or building something can also improve your memory power.

Laughing and avoiding stress can also improve your memory and concentration.

Answer 2

You can train your memory even when you do not notice it.  For example, when you play with children in words or solve a crossword, you also train your brain.  These are wonderful exercises with which you can develop yourself.  Try to teach poems with children - the best exercise for training memory, humanity has not yet come up.  There are also special preparations for memory, for example https://nootropicboost.com/buy-best-nootropics/aniracetam/ .