candidate specification by W3C

[shaharhada]

In text before the title Overview appears:
...At first, the companies doing such tracking were mainly advertisers or web analytics companies; later social media sites also started to use such tracking techniques, for instance through the use of buttons that act as tracking beacons.
In 2017, W3C published a candidate specification for an interface that web developers can use to create web beacons.
In the site: https://en.wikipedia.org/wiki/Web_beacon
What is the meaning of the underlined text?

 

[Aeacus]

A Candidate Recommendation is a document that W3C believes has been widely reviewed and satisfies the Working Group's technical requirements. W3C publishes a Candidate Recommendation to gather implementation experience.

Source: https://www.w3.org/2004/02/Process-20040205/tr.html