What's a synchro deck?

Please rate and upgrade my synchro deck! I am using it to go for the yugioh regionals?

• This is my deck list Extra deck:15 1x Red Nova Dragon 1x Majestic Star Dragon 1x Shooting Star Dragon 1x Dragon Knight Draco-Equiste 1x Junk Destroyer 1x Red Dragon Archfiend 2x Stardust Dragon 1x Ancient Fairy Dragon 1x Junk Archer 1x Turbo Warrior 1x Drill Warrior 1x Junk Warrior 1x X-Saber Wayne 1x Formula Synchron Note: I do have an extra Formula Synchron and an extra Red Dragon Archfiend if needed Monsters:23 2x Max Warrior 2x Quillbolt Hedgehog 2x Sonic Chick 2x Speed Warrior 1x Shield Wing 1x Turbo Booster 1x Big one Warrior 1x Stardust Xiaolong 1x Justice Bringer 3x Junk Synchron 1x Majestic Dragon 1x Quickdraw Synchron 1x Trust Guardian 1x Bri Synchron 1x Glow-up Bulb 1x Flare Resonator 1x Changer Synchron Spells:5 2x Synchro Blast Wave 1x Super Polymerization 1x Silver Wing 1x Synchro Boost Traps:11 1x Scrap-Iron Scarecrow 1x Defense Draw 1x Synchro Strike 1x Miracle's Wake 1x Tuner's Barrier 1x Synchro Material 1x Synchro Deflector 1x Trap Stun 1x Scrubbed Raid 1x Sakuretsu Armor Deck Count: 39 Feel free to add in a monster or spell or trap card in without replacing anything, but please keep the deck count at 40 and rate this deck /10. Thank you very much. Hurry up though, because the regionals are on March 26th!

• Answer:

  alrighte -sak armor and +d prison +summoner monk(to synchro like ten times faster) +dandy(if you wanna synchro like even faster) -defense draw(its okay but sorta dead) +pot of avarice(to make up for defense draw) +gorz(even tho it doesnt fit your deck its an amazing savior card) +add colosal fighter to extra deck he really cant die other than that purdy good deck