Useful Macros

Say you want to rapidly cast a chain of instant spells/buffs on your individual. A few classes (like Druids and Mages for example) have many buffs to location on themselves in wow quest watching our back. Trying to click on a fast self buff in the heat of battle may escape a player's mind. Simply placing with each other a few spells with /cast into a macro can fix this:

/cast Furious Howl
/cast Blood Fury
/cast Call from the Wild

Bear in mind that the spells used have to be ones that don't trigger the international cool down. The global cool down is really a thing when an action 'locks out' other player actions around the tool bar for a few seconds. It is slight but this action can mess up a macro as macros generally don't do delay type casts (and macros that do work on a timed delay are against the ToS).

Macros are also extremely useful for targeting certain key targets or players in a group. I recall utilizing a custom macro for keeping up using the raid tank especially for heavy trash pulls:

/target 'raid tank name here'

It's simple and it keeps me locked onto what the primary (or off tank if require be) tank's actions also as his target not wasting that essential bit of time looking for them. Time wasted looking is time wasted not dpsing/healing wow quest finder.