An image title, caption, Alt text, and description
The image title attribute provides additional information about an image. Most SEO experts say that titling an image is not used in search ranking, but every picture must have Alt text. Titles give identity to the subject.
The Google algorithm searches rich-media content; hence the website webmaster considers it worth giving the title, alt text, caption, and description. Image optimization is an effective technique to drive traffic to a website.
The Image must reflect the page content theme, and it must be relevant. An SEO expert changes the image names and creates a keyword-rich filename. The description indicates what the Image is all about; hence an expert must include two-three lines with keywords.
The Image must look natural on the page, and most web designers wrap the Image with contextual text. The keyword-oriented text included in title tags, meta tags increase the keyword density of the page.
Ananova suggests that the Image must have a minimum 1200 x 675 size for good resolution. However, recommended to reduce the Image's file size as much as possible without sacrificing quality to keep page load low.
- PNG (Portable Network Graphics): better quality images but comes with larger file size. For banners, storing line drawings, text, and iconic graphics, choose PNG format, as graphics and the pictures with letters usually look better.
- JPEG is the lossy compressed standard file format of digital cameras and most command format used on the web due to its compression and universal support. As a general benchmark, 90% JPEG quality gives a very high-quality image while significantly reducing the original 100% file size. You may lose image quality but usually are more SEO-friendly than PNGs, especially with transparent backgrounds. And, 80% JPEG quality gives a more significant file size reduction with almost no loss in quality. It helps store photographs at a smaller size than a BMP.
- WebP: It provides images of indistinguishable quality to their JPG and PNG counterparts, but for a fraction of the size – thus improving loading times for your viewers while delivering the same quality experience. Choose lossless or lossy compression using this, the only image format supported by Chrome, Edge, and Firefox. 79.2% of browsers support the WebP image format, according to ‘Caniuse.' Safari 14, released in September 2020, supports WebP. WebP offers 25 – 35% smaller file sizes at the same SSIM quality index. It provides a better overall package than JPEG as an image format.
- TIFF: It uses a lossless compression algorithm to preserve as much quality in the Image.
A preferred toolkit to optimize the Image when it is saved, thus providing better loading time like Image API Optimize
Google Can Read Embedded Text in Images