Gmail

1. Pick your brand above, then fill in your details — the preview updates as you type.
2. Click Copy signature.
3. In Gmail, click the gear icon ⚙ (top-right) → See all settings.
4. On the General tab, scroll down to Signature and click Create new (name it after your brand).
5. Click inside the signature box and paste with Ctrl/Cmd + V.
6. Under Signature defaults, select your new signature for new emails (and replies, if you want).
7. Scroll to the bottom and click Save Changes. Done!

HubSpot

1. Click Copy HTML code (not "Copy signature" — HubSpot needs the raw code).
2. In HubSpot, click your profile avatar (top-right) → Profile & Preferences.
3. On the General tab, open the Email tab and find Signature.
4. Click the </> (HTML / source) toggle on the signature editor — this is the step that's usually missed.
5. Paste with Ctrl/Cmd + V, then click Save.