As per as my understanding of trade shows before giving away the gift, fill feedback forms from clients or customers . There are minimum 4 types which necessary for event show :
Make best marketing strategy .
Make best presentation
Try to engage clients through various creative activities
Last but not least : Distribute some gift like toys, food and many more…
There are lot of company in internet which offer PowerPoint Templates and excel services but how will you judge company whether it is a good or bad so always check portfolio of that company . after checking portfolio , Price is also matter . Outsourcing is good for price because they can take less money for execution .
Banner advertising is usually sold on CPM (cost per impression) or CPA(Cost per acquisition) basis so the position of your banner ads on a website is a very critical factor to engagement and through click. so This could be also important factor for revenue purpose.