Job board
Also called job site, job aggregator.
A site that lists openings from many employers — either posted directly by them or scraped and aggregated from their careers pages.
There are two kinds and the difference matters. A primary board holds postings employers submitted to it. An aggregator crawls thousands of company careers pages and republishes what it finds. Aggregators have far more coverage; primary boards have fresher, more reliable data and working apply links.
The practical consequence is duplication and decay. The same role appears on six sites with three different posted dates, and aggregated listings routinely outlive the requisition they describe. Applying through a stale aggregator link is one of the most common ways an application quietly goes nowhere.
Where you can, apply on the employer's own careers page even when you found the role elsewhere. It's the copy that's current, it's the ATS the recruiter actually reviews, and it avoids the source-attribution mess that sometimes routes an application into a partner agency's queue instead.
Evergreen requisition
A permanently open posting used to collect candidates for a role the company hires continuously — or isn't hiring for right now at all.
Job posting
The employer's public description of a role — part specification, part marketing, and rarely a literal list of requirements.
Boolean search
Searching with AND, OR, NOT and quoted phrases to control exactly which postings — or candidates — a query returns.