Proper and relevant meta tags can convey the introduction of any web page to search engine robot but with having proper H1-H2 tag you can manage the keyword density. Search engine optimization firms encourage independent SEO professionals to use image alts to manage keyword density on every web page this will not only increase the possibility to rank high but also make it easy for search engines to analyze the importance of every web page on the website individually.
Some common tips while using Image Alts
Content by - RRWDG search engine optimization