[Android Apps and Games] skulk3r:
Here are some basics that every beginner needs to know (or if you just need reminding).

Profile:

Not much explanation needed. A profile contains all the required settings for a particular purpose - it is usually recommended that you give your profile a name that makes sense (e.g.: "Wifi at home" for turning on/off your wifi when you are near your house). A profile has:

Contexts

Tasks

Exit Tasks (not always)

Contexts:

A Context is basically an on/off switch for your Tasker profile - something that tells Tasker that a certain thing has happened/is happening and so Tasker should do something about it. When you tap "new" in Tasker and have given your profile a name, you will be given some choices for your Context. A Context can be:

Application (profile is activated by the opening of an app)

Time (this can be through a time interval or a set time frame)

Day (profile activation based on which day/month you are on)

Location

State (of your phone)

Event (something that has happened to the phone)

Tasks:

Once your profile has been triggered by your Context, you want it to do something - this can be switching on Wifi, or locking your phone, or turning on the GPS, launch an application, etc. You have amazing control over what your phone does! You will need to explore the different options in order to understand the kind of control you have.

Exit Tasks:

An exit task tells Tasker what to do once your Context is no longer true (e.g.: you are no longer near your wifi network). You can tell Tasker to switch things back on that you might have turned off (or vice versa). You do not need to have an exit task, but sometimes it is useful. You CANNOT have an Exit Task if your Context is an Event.

Monitoring your context:

Some contexts (like "Location") require Tasker to recognise when it is in a certain area or not - this is how Tasker does it.

To find a wifi network using the "Wifi-Near" context, Tasker switches on your wifi briefly (specified in "Menu -> Preferences -> Monitor -> Wifi Timeout Seconds") and scans the wifi networks available. After the specified amount of seconds has passed, Tasker will then switch off the Wifi scanning. Tasker begins scanning for wifi networks again after another time interval (specified in "Menu -> Preferences -> Monitor -> Wifi Scan Seconds"). Obviously the more you scan the more battery you use, but also the more responsive Tasker will be. And obviously the shorter amount of time you spend scanning for networks, the more battery you save, but you also have a lower chance of connecting to a network. Tasker can only do this wifi-scanning if you have set your Wifi to [TOGGLE] or [ON] - it will not do it if you have set your Wifi to [OFF].

GPS is a much more accurate way to find your location, but obviously much more battery intensive. Settings are much the same as the Wifi ones and are found in "Menu -> Preferences -> Monitor". Tasker can only update your GPS location if you have set your GPS to [TOGGLE] or [ON] - it will not do it if you have set your GPS to [OFF].

Network Location is the least battery intensive, but also the least accurate. Tasker checks your network location according to the time specified in "Menu -> Preferences -> Monitor -> Network Location Check Seconds".

...more to come.