Picking a domain name that works
A generator is good at volume; the judgement is still yours. The names worth keeping tend to survive being said out loud. Read a candidate to someone over the phone — if they have to ask how it is spelled, the name will cost you traffic every time it is shared verbally.
Short, readable, typeable
Shorter names fit in more places and survive being typed on a phone. Hyphens and digits are the usual sources of confusion — both force you to explain the address rather than simply say it.
Relevance and extension
The name should hint at what you do without describing it exhaustively. On extensions, .com remains the default people assume, but .io and .co are well understood in their contexts. Registration rules and requirements differ between extensions — the domain checker answers a name across every extension you select in one pass.
Availability is not the same as clearance
An available domain only means nobody has registered that string. It does not mean the name is free of trademark or other rights in your market. Check names you are serious about against the relevant trademark registers, and take professional advice where the stakes justify it. For a name that already exists, the WHOIS / RDAP lookup shows who holds it and when it expires.
DomainsMesh is an independent tool, not a registrar, and does not provide legal advice.