Warped records happen for many reasons. Improper storage (remove your shrink wrap to avoid warping records), exposure to heat, mishandling at the pressing plant and many other factors lead to records being less than flat. Playing warped records can distort the sound, increase inner groove noise and cause skips and other unpleasant sonic artifacts.
Perfect Vinyl Forever utilizes a four hour flattening cycle in $2000 record flattening machines. This will fix nearly all dish warps and most edge warps. Your records will play true and be free from inaccurate sonic artifacts such as pitch and speed variances and channel imbalance problems.