Modifying large sites is a very time-consuming job that it will be hard to perform without a schedule. It doesn’t matter how the updates will occur: whether the owner will install them, whether it will instruct the employee or the whole organization, the main thing is regularity.
The absence of updates on the site for a long time will cause search engines to consider the resource dead. On the other hand, too frequent updating of web pages moving in search yield can knock citation down. Therefore, the most optimal refresh rate is considered to be 1 every 2 weeks.
Other important rules for updating are the content of the site and updating primarily those pages that do not are in the top 100. Pages included in this top should interest you less. Their movement to issue to the top 10 depends on the relevance, originality of the text and reference mass of the page.
So, the site update schedule should focus on the list of pages not in the top 100. Depending on the number of such pages, update them one, two or three per day so that within a month you can update them all. Such inhurriety and dimensionality in working with content is necessary for the search engine to perceive these actions as normal work with the site, not an optimizer fit of content.
Don’t just work with texts. Pay attention to regular updates of the site graphics elements. Try to reduce the weight of images so that users are more comfortable with uploading web pages. Saturate with keywords the pictures and the texts that replace them. To keep in mind graphical updates, write these actions in one of the points in your chart. Large work with the graphics of the site is recommended to be carried out 1-2 times a year.
By making changes to the site constantly remember about your visitors. If possible, do not change the location of navigation buttons and section names. Otherwise, your regular customers will no longer be able to find what they require. By conducting large-scale work with graphics, try not to overfight and not scare away users.