Moz Pro
One of the oldest SEO platforms, and the company that introduced the domain authority, page authority, and spam score metrics the industry still quotes.
Analogy Mental model
The elder statesman of the field. Younger tools may be in better shape, but everyone still compares rank using the scale he defined.
In practice What you actually do
Install the free MozBar extension and scan authority scores across a results page before deciding whether a keyword is winnable. Use the spam score as a first-pass filter when triaging an unfamiliar link profile, then verify anything suspicious elsewhere.
Where people get burned Pitfalls
Authority scores can be inflated artificially, and resellers have exploited that to sell worthless domains at premium prices. Always cross-check claimed authority against real organic traffic in a second tool.
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