The Weekly Image Optimisation Checklist for Marketers and Site Owners
Image optimisation isn't a one-time project — it's a habit. The marketers and site owners with the fastest sites all share one thing: a quick weekly checklist that catches new bloat before it accumulates. Here's the routine, in 10 minutes a week.
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The Monday 10-minute audit
- Open PageSpeed Insights and run your homepage on mobile.
- Note the LCP value and the 'Properly size images' savings.
- Open the top 3 most-trafficked pages from the past week and repeat.
- List any image flagged as needing compression.
The fix (5 minutes)
- Download the offending images from your CMS.
- Drop them into the compressor on our homepage.
- Re-upload at 75–80% quality, replacing the originals.
- Clear your CDN cache if you have one.
Per-content checklist for new posts
- Resize hero images to 1600 px max width before upload.
- Compress every image to 75–80% quality.
- Set width and height attributes (your CMS usually does this).
- Write descriptive alt text — full sentence, no keyword stuffing.
- Lazy-load below-the-fold images (loading="lazy").
Quarterly cleanup
Once a quarter, sort your Media Library by file size and compress the top 50 offenders. This catches images uploaded by team members who didn't follow the per-content checklist, and cumulatively shaves seconds off your average page load.
Why a checklist beats a plugin
Automated plugins help, but they're black boxes — you don't see what they're doing or how aggressive their compression is. A 10-minute weekly habit means you stay in control, you spot quality issues immediately, and your site stays fast as it grows.
Frequently asked questions
How often should I audit my site?
Weekly for active sites, monthly for slower-moving ones. The goal is to catch new bloat before it stacks up.
What's a healthy mobile PageSpeed score?
Above 80 on mobile is good. Above 90 is excellent and usually only achievable with disciplined image compression.
Can I delegate this to a VA?
Yes — the checklist is simple enough that any virtual assistant can run it weekly with 10 minutes of training.
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