What a good project template contains
A template is a project you have already thought through once. Its value is in the decisions it saves: which stages the work passes through, which tasks always happen, who usually owns them and how long they usually take.
A useful template includes the standard task list grouped by phase, the statuses that apply, default owners by role rather than by name, relative dates such as "five days after kickoff", and the checklists for steps that are easy to forget, like approvals or handover notes.
It should leave out anything specific to one past project. Old comments, client names and one-off fields make a template harder to use, not easier.
Vendor templates versus your own
Many tools offer template galleries, and they are a good way to see how a tool expects work to be organized. Treat them as examples. A marketing campaign template from a vendor will not match your approval process or your team's roles.
The templates that pay off are the ones you build from your own completed projects. After a project ends, copy it, strip out the specifics, keep what worked and fix what did not. The next project starts from a better baseline.
Check how each tool handles templates on your plan. Some tools limit templating to paid tiers, and some let you template only certain items, such as tasks or lists, rather than whole projects with their views and automations.
Keeping templates from sprawling
If anyone can create templates, expect duplicates and unclear versions. Keep one owner for each template, name templates by process rather than by person, and review them twice a year.
Watch for field bloat. Each new custom field added "just in case" appears on every future project. If a field is empty on most projects, remove it from the template.
Test a template before you rely on it. Create a project from it, set a real start date, and check that relative dates, owners and automations come through as expected. Some tools copy tasks but not views, permissions or rules, so confirm what carries over on your plan.