helpp to understand different spvp modes.

[valkyrie.4563]

so recently i started to play the  gw2 pvp  side of things .but i am having hard time understanding what i need to do in each mode . 

i have tried searching on youtube or other sources to understand these pvp modes but most videos are either about builds or general pvp tips . no video or source tells what to do in each of the pvp mode or map . 

any link to a video or source that explains them will be super helpful . 

[Nash.2681]

Not a video, but a quick overview about objectives/scoring for each mode can be found in the wiki: https://wiki.guildwars2.com/wiki/Player_versus_Player