@Alexander Lau It is definitely eye opening but it is true and the smaller the website is, the bigger the % of bot traffic you will have!
@Jason thanks for sharing our traffic quality report.
For automotive websites, the issue with bad vs. good bots is very different.
Good bots are crawlers and indexing bots that Google / Yahoo uses to index the internet which is good but it can be bad as they can scrape data from your site to build market pricing in your region or do competitive intelligence by vendors who could potentially sell that information to your competitors.
In terms of bad bots, you should be concerned about them when it comes to paid advertising traffic sources. Based on our research, 40%+ of paid advertising traffic were bots or non-human traffic but it really depends on what type of advertising you do. Adwords usually has <3% bot traffic whereas display, retargeting, email can have on average 40-50% bot traffic.
If you suspect some of your traffic to have bots, you can easily do a quick test in Google Analytics by taking a look at your traffic source by Service Provider or Device type. If you have service providers who are not usually associated to home or business internet (T-mo, Cox, Comcast) and see a lot of traffic coming from servers like Amazon or Digital Ocean, then you should have some concern. In terms of device type, if you see more than 70% of the traffic coming from desktop, you should definitely be concerned that you have bot traffic unless of course if you were only targeting desktop (Although I don't know any ad campaigns that would target specifically desktop).
Few resources that can help point you in the right direction below:
blog post on how to detect suspicous traffic:
http://blog.orbee.co/blog/wasteful-ad-spend-detection
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