You can either just manually add ?debug in the address bar>  yourdomain.com/web#home becomes yourdomain.com/web?debug#home Or clicking on Settings>Activate Developer Mode.

When the page refreshes, the menu option should now be visible. On Enterprise it is in the Apps module.

In the "Applications" apps, you can see all the modules Odoo has built in, the "Install" button will be avaliable, just click it and wait until it redirects you to the main apps view!

For advanced custom modules installation:

1.- Drop your folder into the addons folder or if you have a custom_addons folder configurated, thats better.

2.- I'd recomend restarting the odoo service, but you can try to enable odoo developer mode in Settings, then you go to Apps, click on update the list of applications and now search for it

Hope this helps.

Thank you!

I follow the steps mentioned by Daniel, but the new module not appear in the list.