Why image optimization is so important
Image optimiztion enables photos to be indexed by search engines. A serach engine indexes content by reading what it is. A search engine can then display theerenlevent content in the search engine results page. If a photo is not optimized for a search engine, it will not appear in a search. A serach engine is not able to read or see a photo. The search engine relies on the content creator describing what the photo is so that the search engine understands what is in the photo.
For example, the photo above is
Use Search Friendly URL structure

Image Optimization in WordPress
ALT TEXT
TITLE
CAPTION
DESCRIPTION
FILE URL

photo file types
PNG
JPEG
VECTOR

PHOTO FILE SIZE AND COMPRESSION
PAGE LOAD
COMPRESS PHOTOS
CACHE PHOTOS