So, you thinking about picking up Kled? Here are some reasons why it is a good idea!

-Very good early game!
-Playstyle that is COMPLETELY different from any other champ in the game!
-Probably the best voicelines in the game!
-Deals a **** ton of damage!
-With my build - Is pretty tanky!
-Not that hard to learn - But the skill ceiling is very high!
-Come on, who would not want to ride a damn lizard!

Alright, did I convince you yet?
Maybe you want to climb? In that case, Kled is a perfect champion for you! He is a soloqueue MONSTER. Nobody knows what he does (you will often see people complaining in chat about that).
If you want to climb out of low elo, Kled is a good option as well. If you are iron-silver, literally nobody there knows what to do against him because they are not used to playing vs him.

This section will be about some tips on how to effectively DOMINATE your games as Kled.

1. W HOLDING - This is a common strategy used by experienced Kled players. When watching a Kled OTP play, you might spot that they keep their W unleveled upon reaching lvl 2. This is because they wait until a fight happens, during which they dismount and level up their W, guarenteeing a fast remount, usually winning the fight.

2. COMBOS - Kled is not a hard champ combo-wise. He is an autoattacker, which means most of his damage comes from auto attacks. With that said, there are a few combos you should keep in mind for effective fights.
-BASIC ALL IN: E-Q-4 W AUTOS-E2-DISMOUNT-dis.Q-AUTO UNTIL REMOUNT-REPEAT UNTIL DEATH OF ENEMY
-ENGAGE: R-E-Q-WAIT FOR ENEMY TO FLASH OUT OF Q RANGE-E2
- DISENGAGE: FLASH-dis.Q-KITE WITH W UNTIL REMOUNT-E-R AWAY FROM OPPONENT

3. UNDERSTANDING YOUR ROLE - After laning phase ends, you need to understand what your role will be. First, assess your team: Do they have a tank? Do they have at least 2 reliable damage sources? Do they have good engage?
Now, try to fill in the role that is missing in your team. For example, if the team comp is like this:
Kled Top
Zac Jungle
Veigar Mid
Samira ADC
Nautilus Support

They already have a lot of tanks, so there is no need to build a tank item and act as a frontliner. They also have 2 decent damage sources. So in this game, your role would be as a backline demolisher, ulting to teamfights from the opposite side, accessing their backline and deleting it before the enemy frontliners can do anything about it.
You also have to pay attention to the enemy team. Lets do one more example, this time with an enemy team instead of yours:

Malphite Top
Vi Jungle
Hwei Mid
Smolder ADC
Lux Support

In this game, the enemy team has much better teamfighting than yours. With all of these champions, there is no chance to beat them in a teamfight becuase Kled does not have good teamfight capability compared to lets say Malphite. In this game, you should focus more on creating a gold advantage from splitpushing, which will prompt the enemy team to send one of their teamfighting champions to stop you, allowing your team to safely engage in a 4v4 fight, which you can join with Ult much faster than the enemy that went to stop you, which has to walk all the way back to mid.