There are mainly 3 different types.
True View
If you’ve selected True View ads to form the basis of your YouTube video advertising campaign, your videos will be shown to users before they view a normal video. You’ll be charged per view for these ads and there’s no upper time limit. There are also four types of True View ads, but the most popular are:
- In-search ads—these appear in YouTube search results when the viewer’s search is related to the advertisement’s keywords. Sponsors pay for ads that are watched by a viewer.
- In-display ads—these are legacy formats that appear in YouTube’s promoted video ads overlay, in video suggestions, related videos, and in Google’s click-to-play format. They are opt-in video ads.
Pre-Roll
This type of YouTube video advertisement is shown before a video, and runs about 30 seconds. They’re charged per click, meaning you only pay for the total number of clicks generated, rather than the number of video views.
Bumper ads
Bumper ads are a 6 second, non-skippable clip before a regular video.