What is a reading?
Wikipedia defines it as:
A psychic reading is a specific attempt to discern information through the use of heightened perceptive abilities; or natural extensions of the basic human senses of sight, sound, touch, taste and instinct. These natural extensions are claimed to be clairvoyance (vision), clairsentience (feeling), claircognisance (factual knowing) and clairaudience (hearing) and the resulting statements made during such an attempt. 

 There are different types of readings.  I have listed a few examples below.  Readings are not limited to just one type as a reading could contain all types.  The type of reading you receive depends on the reader and their abilities.

Spirit Communication

Spirit communication is when your loved ones who have departed come through in your session and tell you about their life with you   when they were alive.  They also  tell you things that have happened in your life after they have departed.  Many people seek out this type of session to feel closure with the person who has departed or for that period in their life.

Past, Present, Future

Past, present and future readings are readings where the psychic will pick up and translate what energy is around you and how it might impact you.  This type of reading is good for people who are in a transition period of their lives whether it's personal or professional. This session is revealing as you understand where you are, how you got there and where you're going.  

Spiritual  Counseling

Spiritual counseling is for people who find themselves is spiritual crisis.  Or people who feel like that have lost their way or themselves.  Many empaths need spiritual counseling  as they are trying to get by in a world where they have very little validation or consideration.  The sessions can be intensely  empowering and life changing  for the empath.