Basically like the other two had said about sums it up.
Playing support basically seems like it is a boring and highly meaningless position because you aren't the person getting kills. You may feel as if you aren't contributing much to the team by being a support. However, whether ADC's like to admit it or not, a majority of the time (when they are doing really well in lane) they like to neglect that the support got them where they needed to be in order to carry the game. I am a support main and have been since season 4, I went from bronze to gold with just playing as Morgana support (Before it became popular in the LCS).
This season it basically feels as if a Tank meta wins, but that isn't always the case. I usually pick blitz crank, regardless of the opposing bot lane. I feel as if the enemy pushes you up to turret early, they are setting themselves up for failure (If you are playing blitz). All you need is a Q and then E combo under turret, then your adc and turret can do the rest, If you don't kill them you at least wasted 1 if not 2 of the summoners on bot lane.
1st off, make sure you keep up good vision in the bot lane, I like to do an early invade/harass with blitz in order to get a flash, or possibly another summoner spell. If they don't know I am there, I will pull the enemy gromp or Krug, and have it reset. Which will delay them a little bit in the JG and also in lane. However as for wards try and get a sight stone on your first back along with a pink ward, I like to ward my side tri with the pink ward, and then put one in river bush, 1 by dragon pit, and one by their blue or red path (depending on which side you are on) Good vision wins the game in that aspect.
2nd, Know your fight and when you can take it. Pull only when and if you know you will get a kill or at least a summoner spell. Stick with your adc, let him know when you are going to be leaving lane to go ward so that way he isn't overextended and gets killed. Leaving him to blame you for his lack of game sense.
3rd, Team fights, pretty much the same as number 2, however you will be with your full group, and always try to make sure you are keeping them off your ADC by_ peeling_. As much as you may hate your adc, he is going to be the saving grace in most cases. Don't let anybody get you down in the game, Your role is just as important as any other lane.
I know this is just a broad spectrum of information based around blitzcrank. However i also play Janna, Nami, Thresh, Karma, Tahm, Trundle, and Morgana. Each one has their own play style, you just need to find yours. _NEVER _tell yourself that the support role is pointless and stupid. Have fun. I hope that this has helped, however if it doesn't, I apologize for wasting your time.