Do you mean āsearchableā (as in a āsite searchā on your own site) or do you mean āindexedā (by search engines)?
If you are referring to Google searches you are talking about Google INDEXING your site. Google used to use the KEYWORD meta tags to help but itās my understanding that the use of keywords in the meta-tag is now an old practice and KEYWORDS meta info is not used much. Google has their own methodology for indexing your page and ranking it. To learn about all this just search the web for āGoogle Rankingā and similar terms.
If you are talking about site searches (using a search box to find things on your site) then you need a tool to do that. There are some RW add-ons that allow site search, there are also tools āoutsideā of RW that you can use. I use a great search tool name Zoom search. But it is probably above the needs and capability of the average user (itās a stand alone php script that you install and configure on your server.)
There is nothing magic about RW or any other web tool that will give you high rankings on google⦠It is about a thousand other things on how you build your site, regardless of the tool you use.