Preparing to work with sound effects

Why do you think we use SFX's in TV and Film production?
Sound effects are used in film because it provides a sound to make the scene more believable and realistic, with most shots if you didn't have any sound effects it wouldn't look very good as sound is just as important as the visual. For example If i were to shoot a scene where Harry is shooting Casey without a sound effect it wouldn't look believable, but with the sound effect it completes the clip.

What are the advantages of using SFX's in TV and Film productions? What do they add to the overall production?
Sound effects make the whole production, without them there wouldn't be a program. Every program uses sound effects because if they didn't even something like opening a door wouldn't look right because it wouldn't have the appropriate noise.

What are the disadvantages of using SFX's in TV and film production?
Sometimes the effects are not right for the scene so a disadvantage would be that sometimes the right effect isn't used. Also on some Sci-Fi shows use a ridiculous amount of sound effects and that makes them look cheesy and non realistic.

What is the job description of a foley artist?
A Foley Artist creates and performs replacement sound effects in sync to picture in a recording studio, such as footsteps, clothing and properties’ noises, paper movement, doors creaking, dogs scratching etc. They work under the direction of a Sound Editor and often use their own extensive collection of small props. They are the unseen actors who reproduce sounds, required when the original track is either unusable or completely replaced as in the case of foreign versions.