Google Analytics recently changed their API to version 4 and upon other things, they changed the way the tracking identifier is set to the page. I suppose that the plugins will migrate soon to that changes but in the meantime, this is the only plugin available that works with that new API version: gatsby-plugin-google-gtag. So:
// In your gatsby-config.js
module.exports = {
plugins: [
{
resolve: `gatsby-plugin-google-gtag`,
options: {
// You can add multiple tracking ids and a pageview event will be fired for all of them.
trackingIds: [
"GA-TRACKING_ID", // Google Analytics / GA
"AW-CONVERSION_ID", // Google Ads / Adwords / AW
"DC-FLOODIGHT_ID", // Marketing Platform advertising products (Display & Video 360, Search Ads 360, and Campaign Manager)
],
// This object gets passed directly to the gtag config command
// This config will be shared across all trackingIds
gtagConfig: {
optimize_id: "OPT_CONTAINER_ID",
anonymize_ip: true,
cookie_expires: 0,
},
// This object is used for configuration specific to this plugin
pluginConfig: {
// Puts tracking script in the head instead of the body
head: false,
// Setting this parameter is also optional
respectDNT: true,
// Avoids sending pageview hits from custom paths
exclude: ["/preview/**", "/do-not-track/me/too/"],
},
},
},
],
}
All the above parameters are optional, just omit them and replace the GA-TRACKING_ID for your real identifier.