There are 2 different methods for converting your image to vector, the first is auto tracing and the other is having a manual vector conversion.
Auto tracing your artwork into a vector image can sometimes be beneficial depending on the quality of the original image. In my view autotracing is only really successful when performed on high resolution images although it doesn’t really work for most logos. It would produce fairly decent results on a photograph but then what is the point as it will never be as good as the original photo image. Also it may contain several thousand or million points and lines that might produce a large file size.
Auto tracing logos will very rarely produce decent results. Most typefaces contain some geometrical elements that are consistent throughout; therefore the results from an autotrace would just not be suitable. But it may be suitable if performed on a handwriting style typeface where the irregularities of an autotrace may not be that noticeable. But if you imagine how a company logo may be used, for example on the side of a van or large vinyl banner then any small flaws will be magnified.
A logo could be part manually drawn and part auto traced. For example imagine a logo which contains text and a graphic element. If the graphic is a very complex or detailed random image such as a silhouette of a tree then it might be OK to autotrace and produce good enough results. But the text would have to be manually redrawn.
We rarely autotrace images, although sometimes it works out to be more suitable and can reduce the costs to our clients.
Manual Vector Conversion
So generally as a rule, if your logo needs to be redrawn into vector then we would advise that it’s manually redrawn as it will always produce superior results.
If you look at the example above this will give you some idea how your logo may turn out compared to a manual vector conversion.