If you’re using builder for hosting ( custom domain or a builder domain (*.builder.live) , you can control what get sent in the head in the html response on that domain, to do so:
On the page entry you’d like to change its head html (for favicon of robots meta tags for example), head to the data tab and scroll to Edit content js + css
And in the JS section, type in
// example for adding favicon and noindex meta tag
state.customHeadHtml = `
<link rel="icon" type="image/png" href="..." />
<meta name="robots" content="noindex,nofollow" />
`
Alternatively if you only care about changing meta tags, you can have a metaTags object on the state and assign each tag to whatever you content you need
state.metaTags = {}
state.metaTags['og:title'] = 'My dynamic title'
state.metaTags.description = 'My dynamic description'
state.metaTags.title = 'My dynamic page title'
state.metaTags['twitter:card'] = 'Summary'
state.metaTags.robots='noindex,nofollow'
becomes (in the <head> of your page):
<title>My dynamic title</title>
<meta name="description" content="My dynamic description">
<meta name="og:title" content="My dynamic title">
<!-- etc -->
