What a rank tracker measures
1 · Position
Your URL's place in the organic results for one keyword, in one country, on one device. Position 1 is the top organic result — ads and AI answers sit above it but are counted separately.
2 · History
A single snapshot is noise; a time series is signal. Trackers re-check daily or weekly and store every observation, which is what the ribbon in the 3D terrain above represents: each column is one week, height is how close to #1 you are.
3 · Search volume
Average monthly searches for the keyword. Volume converts a ranking into a traffic estimate — ranking #1 for a 10-searches-a-month term is a trophy nobody sees.
The two newer signals
4 · Difficulty
A 0–100 score estimating how strong the current top-10 pages are (links, authority, content depth). High difficulty means slower climbs — drag the difficulty slider above and watch the recovery curve flatten.
5 · AI visibility
The new frontier: how often ChatGPT, Perplexity, or Google's AI answers cite your domain when users ask related questions. Classic trackers ignore it; newer open-source tools sample AI answers and count citations. Toggle the AI layer above to see it plotted as floating markers over the terrain.
Why "build it yourself" works
Rank checking is just: fetch results for a keyword, find your domain, store the position. Commercial tools charge for scale and polish — but the core loop fits in a small script, which is why open-source trackers keep appearing.