What should I focus on?

I used to play a bit of chess 5 years ago when I was 10 then I completely dropped it. Recently I've picked it back up and have started playing regularly for the past 2 weeks. I played about 200 games this year and just this month have played about 220 games (mainly rapid). My rapid rating peaked at 1098 yesterday with around a 300 point increase this month (most of those are from the past 2 weeks). I havent learnt any chess strategies except the king pawn opening. what should I focus on to improve my game  since I am not able to win the games as frequently as before

Have you tried the lessons here? They have gone to great expense to get masters to offer you their wisdom. Chess can't be reduced to a few simple tips.

Dear Are_5,

I am a certified, full-time chess coach and International Master, so I have seen it and tried it all.
There are so many ways to get better and I know it can be overwhelming.
You can learn from free videos on youtube, there are books at your disposal that can all help, but they are not tailored to your needs.

One of the most important things you can do is to analyze your games! You must learn from your mistakes! That is a priority. You can't really move on to a new, different topic and learn new ideas if you still make the same mistakes over and over again!

This is where a chess coach comes into the picture. A good coach can show you how to study, what to study, gives you the material YOU need. Naturally, it takes time to use everything in practice, but if you are relentless and persistent you will succeed!
You should learn the main principles in every area of the game (opening, middlegame, endgame).  Don't focus on only one part! You should improve your tactical vision as well as it is part of all areas!  
This how I built my training program for my students. We discuss more than one topic during a lesson so it's always interesting and they can improve constantly. I give homework too and the right tools to make practicing enjoyable and effective!
Don't worry about your rating and the ups and downs! Just keep on playing and practicing!

I hope this helps.  I wish you good games and 100+ extra ratings

Your focus should be on tactics. Most games are decided by middle game tactics.

'Focus' on all areas, so Opening Principles, Middlegame, Endgame, Evaluation, Planning, Tactics, Calculation and Visualisation. Play less chess to free time to study. Focus on longer quality games rather than quantity. Adjust emphasis to give more time to your biggest weaknesses. Give it time, months, and you should start to see sustained consistent improvement.

Do you think I should play games with a high time limit?

The longer the better but it depends how much time you can set aside. I mainly play daily because I dont enjoy fast chess (less than G30 is fast for me) but struggle to find time for 45|45 and G60 for example. While learning, it takes time to understand a position, recall what you've learned, then play it out in a game. You'll have more success doing this in longer games. In shorter games, play is more likely to be reactive, based on existing knowledge, rather than applying new knowledge.

Hey buddy was not playing well earlier...but my dad help me in that and of course chess.com ...a suggestion if you have to improve play chess face to face with the person ( the known ones who can guide you properly in chess) they really helps to improve ,as my dad did...best luck to you buddy... Good luck for your future Games :laugh

Chess has a lot of tactics and strategies you can use. But one of my personal favorites that helped me a lot in my 1000-1200's was the Discovered Attack. Basically, this strat involves moving a pawn or another piece to activate a piece (usually a bishop) which at the same time attacks an opponent's piece. Here's an example:

Let's say after e4, e5, Nc3, black moves their queen to g5. Now white plays d4. Usually for beginners, they'd think that your just blundering a pawn. But if they don't realize what d4 also does and captures the pawn, white strikes the queen with Bxg5. Its even better if the discovered attack doesn't offer up a free pawn, but just simply pushes a pawn, offers a pawn trade, or attacks a piece to  make it look like it serves a different purpose.

An even deadlier tactic is the Discovered Attack with Check. When you have the opportunity, you can strike both the king and queen at same time.

Here's an example with a rook, knight and pawn vs queen endgame. Notice that if white plays Ne6, not only does the knight attack the queen, it also opens up the rook which now attacks. the king, putting it in check. Black can't move his queen out of danger cause of check, and blocking the check with Qg4 sacs the queen for the rook, but freely allows white to promote his last pawn. No matter what black does, they are forced to give away the queen, which in most cases makes the opponent resign immediately. A sneaky but brutal tactic in beginner/intermediate level.

Improving Your Chess - Resources for Beginners and Beyond...

https://www.chess.com/blog/RussBell/improving-your-chess-resources-for-beginners-and-beyond

https://www.chess.com/blog/RussBell

Strategy and your other opponents moves 

I had used both of your tips when I started. Usually the people I get matched up against now are not careless enough do make such openings especially cause I play 10 min rapid (there might sometimes be one blunder which lose them the game)

When I play chess, I usually focus on questions like "I wonder what's for dinner?"

So far, it's worked out pretty well. Not sure if it's suitable for under-1200 strength players, though. It might be too advanced.

I too would focus on important questions like tht if I had 1 or more days as the time limit

if you wanna get better at chess, I would focus on chess

Quite an interesting and deep advice, you are literally the epitome of a genius