Possibly an over the top example but it proves the point! Alternet.org is a large online magazine with a huge online community, and as you can see, has a Trust Flow of 68 and Citation Flow of 54.
Trust Flow / Citation Flow = Trust Ratio aka 68 / 54 = 1.259
With a trust ratio of 1.259, you know that this site has links from trustworthy sources and is a good site to outreach to for your client.
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rom this you can see the Trust Flow is considerably lower than the Citation Flow. Using the same calculation you can see the difference in the trust ratio.
7 / 35 = 0.2
The trust ratio here is well below 1 and shows that this site has gained its link profile using ?spammy? techniques.
I discovered this site by looking at the backlinks of a heavily penalised site. It shows that having a lot of links from sites like these will eventually cause issues.