Empty or a dash «—» means there is no data. Zero means the source answered «zero»: the value exists, and it is zero. These are different cases.
Empty and dash
In the catalog table, an empty value is shown as a dash «—». For example, SerpMode could not determine the country, the region or the registration date (then the dash is in the «Site age» column), or there is no data in the history for a month.
Zero
Zero is a real value. Examples:
- IKS 0 means the site has no IKS.
- «Ahrefs traffic» 0 means Ahrefs sees no traffic for the site.
- Zeros in the Majestic metrics mean the site is not in the Majestic database.
IKS for non-CIS sites
The IKS metric exists only for CIS countries. For all other sites, the «Yandex IKS» column shows a dash.
DoFollow and NoFollow
- For a domain with no links, both shares are 0%.
- If there are links but all of them are NoFollow, the NoFollow share is 100%.
Dash in age and in history
- In the «Site age» column, a dash means the registration date could not be determined. More: «Domain age and registration date».
- In the «Data for the domain» panel, a dash or «No data» is shown for a month with no data.
Indicators and empty values
Indicators color a zero, but not an empty value. How highlighting works is described on the page «Indicators».