Quick answer: Slow page speed loses visitors before they see your offer and can raise Google Ads costs. Test with PageSpeed Insights and fix images first.
Every second your page takes to load, some of the people you paid to bring there give up. Google’s own research found that more than half of mobile visits are abandoned if a page takes longer than three seconds to load. When you’re paying $5 to $15 a click, that’s money spent on people who never saw your offer.
How speed affects your ads
- Lost visitors: people leave before the page loads, so you pay for the click and get nothing.
- Lower conversion rate: slow, janky pages feel less trustworthy.
- Higher costs on Google: landing page experience is one of the three parts of Quality Score. A poor experience can mean paying more per click for the same position. See Google Ads Quality Score.
- Click-to-visit gap on Meta: if “landing page views” are much lower than “link clicks” in Ads Manager, people are leaving before your page loads.
How to test
- Run your landing page through PageSpeed Insights. Look at the mobile results.
- Check Core Web Vitals:
- Largest Contentful Paint (LCP): how quickly the main content appears. Aim for 2.5 seconds or less.
- Interaction to Next Paint (INP): how quickly the page responds to taps. Aim for 200 milliseconds or less.
- Cumulative Layout Shift (CLS): how much things jump around while loading. Aim for 0.1 or less.
- Test on your own phone using mobile data, not office Wi-Fi.
The fixes that matter most
Images
The most common problem. Resize images to the size they display at, convert to WebP or AVIF, and lazy-load images below the first screen. A 4 MB phone photo as a hero image can add seconds on its own.
Hosting
Cheap shared hosting is often slow under load. Good hosting with server-side caching (and a CDN) makes a large difference, especially for WordPress.
Too many scripts
Chat widgets, sliders, multiple tracking codes, social feeds and fonts all add weight. Remove what you don’t need, and load tracking through Google Tag Manager.
Page builders and plugins
Heavy page builders and dozens of plugins slow WordPress sites. A lean theme or a simple dedicated landing page often loads two to three times faster.
Video backgrounds and sliders
They look good in a design meeting and cost conversions on mobile. Use a single strong image instead.
Caching
Use a caching plugin (on WordPress, LiteSpeed Cache if your host runs LiteSpeed, or WP Rocket and similar) to serve pre-built pages.
How fast is fast enough?
For ad landing pages, aim for:
- Main content visible in under about 2.5 seconds on mobile
- A “Good” Core Web Vitals assessment in PageSpeed Insights
- A total page size around 1 to 2 MB or less
Perfect scores aren’t necessary. Fast enough that people see your offer immediately is.
Sources and further reading
Written by Gregory
20 years building websites and running lead generation, mostly with my own money on the line. Based in Sydney, working with clients worldwide. How I work →