If you talk like a salesman then you deliver all things very good so seeking publicity/marketing. But you deliver a talk as an expert of area , showing its finer points and its shortcoming, certainly you are delivering a talk worth listening to.
If you talk like a salesman then you deliver all things very good so seeking publicity/marketing. But you deliver a talk as an expert of area , showing its finer points and its shortcoming, certainly you are delivering a talk worth listening to.