What is Grammarly and what is it good for at work?

Grammarly is a writing assistant that underlines problems as you type and offers fixes, plus generative AI that can compose, generate ideas, rewrite and reply. Its help centre groups suggestions into four types: correctness, clarity, engagement and delivery. Its AI page lists agents such as Proofreader, Paraphraser and Reader Reactions, and business features such as Style Guide and Brand Tones.

At work it suits writing that must be correct and clear: client emails, status updates, proposals and support replies. It does not know whether your dates or commitments are right, so it polishes a wrong message as happily as a right one.

How do I get started with Grammarly?

The quickest start is the Grammarly Editor in your browser at app.grammarly.com, which needs nothing installed. Grammarly's help centre recommends the Windows or Mac desktop app if you want it inside other apps and websites, and it also offers browser extensions for Chrome, Safari, Firefox and Edge, add-ins for Microsoft Office and Google Docs, and phone apps. It is cloud-based and does not work offline.

On a work laptop, ask whoever manages your devices before installing the desktop app or an extension, because a tool that works across apps can read what you type in them.

A 10-minute Grammarly starter tutorial

The example is fictional. Priya is an operations coordinator at Harlow Freight, a fictional 30-person logistics firm. She must tell a client that a shipment will arrive two days late. Her draft is accurate but long and has two typos.

Minutes 0 to 2: open the draft

Paste the draft into the Grammarly Editor, or open it in Google Docs or Outlook with Grammarly switched on.

Minutes 2 to 4: fix correctness first

Work through the underlined correctness suggestions one at a time. Dismiss any that change a trade term such as an incoterm.

Minutes 4 to 6: rewrite one paragraph

Select the paragraph explaining the delay and use the generative AI option with a custom instruction: Make this shorter and more direct. Keep the new delivery date, the cause and the order reference exactly as written. Do not add an apology I have not written.

Minutes 6 to 8: test it on the reader

Run Reader Reactions with the target reader set to a client's operations manager. If the next step is unclear, add one sentence saying what the client must do.

Minutes 8 to 10: compare with the original

Compare original and final for the date, the order reference and every promise.

How do I get better results from Grammarly?

Better results come from telling the rewrite what to protect, choosing the reader and letting company settings do the consistency work.

Name what must not change

Every custom rewrite instruction should list the facts to keep word for word.

Set the audience, not just the tone

Reader Reactions works from a target reader. Naming the reader gets more useful feedback than asking for a friendlier tone.

Use the Style Guide and Brand Tones if your company has them

Grammarly's help centre says Pro, Plus and Business users may see grey underlines for their company's style guide. Ask your administrator what has been set up before you invent your own house style.

Treat suggestions as questions

Accepting everything at once flattens your voice and can break specialist terms.

What should I not put into Grammarly, and what do its data terms say?

Do not type or paste anything into Grammarly that your employer has not cleared for it: customer personal data, passwords, account numbers, unreleased financials or material under a non-disclosure agreement. Follow your company's AI and data policy first; this page describes the vendor's terms, not your employer's rules.

Grammarly's Trust Center says it does not sell or monetise user and customer content, and that its algorithms analyse your text, writing behaviour and usage data to give suggestions. It also says your content may be used to train models and improve the product unless you turn off the Product Improvement and Training setting in your account, and that saved Editor documents are kept until you delete them or your account. Its homepage lists confidential mode and data loss prevention as Enterprise features.

Where does Grammarly fall short?

Grammarly checks how you say something, not whether it is true. It will tidy an email that promises the wrong date.

Be careful with its AI Detector and Humanizer features. A detector result is an estimate, not proof that someone used AI, and using a humaniser to disguise AI-written work may breach your employer's or a client's disclosure rules. For drafting from scratch, a general assistant such as ChatGPT usually fits better, with Grammarly as the polish.

How does Tosheo.ai teach Grammarly inside a role path?

Tosheo.ai teaches Grammarly as the editing stage of a writing workflow, not as a separate course. After a short diagnostic, each learner gets an adaptive path of 10 to 15 minute lessons matched to their role, so a support agent practises firm replies and a project manager practises status updates.

Each lesson pairs a short explanation and a worked example from the learner's role with a hands-on task in the tool, marked against a visible rubric with specific feedback. The rubric rewards the habits above: protected facts, a clear ask and judgement about which suggestions to reject. On the Team plan, managers see skill progress and a team report, never the text people wrote. Every plan starts with a 7-day free trial and no credit card is needed.

Sources and scope

Grammarly, official homepage (part of Superhuman, features and platforms), checked 19 October 2026 ↗

Grammarly, AI features and agents page, checked 19 October 2026 ↗

Grammarly Support, Get started with Grammarly, checked 19 October 2026 ↗

Grammarly Support, Introducing generative AI assistance, checked 19 October 2026 ↗

Grammarly, Trust Center (data use and training settings), checked 19 October 2026 ↗