Website Design in DeLand, FL

Because the list of available widths alone does not tell the browser how large the image will be displayed. Without a sizes attribute it assumes the image spans the full viewport width and picks accordingly, which is exactly the behavior you are seeing. Add sizes describing the rendered width at each breakpoint, matching your actual layout, and the browser will choose sensibly. Keep it in sync with the CSS, because when the layout changes and this attribute does not, you get silently oversized downloads that no speed audit will explain.

Almost certainly. Lossy formats are designed for photographs, where gradual tonal change hides the artefacts. Line art, diagrams, charts, and anything with text or hard-edged flat color shows those artefacts as smearing and haloing around every edge. Use a lossless format for that kind of image, or better, a vector file if the diagram was drawn rather than photographed, which stays perfectly sharp at any size and is usually smaller. Keep the lossy format for actual photographs of the clinic and the staff, where it is the right tool.

Rarely. That effect forces the browser to recalculate and repaint a large area on every scroll frame, which mid-range phones cannot sustain, and the result is the juddering you are seeing. If you want to keep something like it, use a fixed background attachment or a transform-based approach that the compositor can handle without repainting, cap it to larger screens, and disable it entirely for anyone who has asked for reduced motion. Honestly, for a contractor's site the effect adds nothing that a strong photograph and clear headline do not already do.

Probably, and it is the hidden cost of theme-driven builds. Many themes store layout through their own shortcodes or custom blocks, so galleries, sliders, and formatted sections exist only while that theme is active. Switch it off and those turn into raw text on the page. There is no clean escape; the content has to be rebuilt page by page. Going forward, keep content in standard formats the platform understands natively and let the theme handle presentation only, so the next change is a design decision rather than a rebuild.

Very likely. A backdrop blur asks the browser to sample and blur everything underneath the header on every frame while the page moves, and on older hardware that is expensive enough to drop frames. Replace it with a solid or nearly solid background once the page has scrolled, keep the blur for larger screens only, or drop it entirely. While you are in there, check the stacking order, because translucent sticky headers are also the usual reason an image lightbox or a dropdown appears underneath the header instead of over it.

The server. If the time to receive the first byte of the page is already high, everything measured after it inherits that delay and no amount of image or script work will recover it. Shared hosting under load, an uncached database-driven page, or a slow origin behind a delivery network will all produce this. Measure the server response time on its own before optimizing anything else. If it is consistently above a few hundred milliseconds, fix that first with page caching, a better host, or both, then revisit the front end.